mirror of
https://github.com/minetest/minetest.git
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827 lines
21 KiB
C++
827 lines
21 KiB
C++
/*
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Minetest
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Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "httpfetch.h"
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#include "porting.h" // for sleep_ms(), get_sysinfo(), secure_rand_fill_buf()
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#include <list>
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#include <unordered_map>
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#include <cerrno>
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#include <mutex>
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#include "threading/event.h"
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#include "config.h"
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#include "exceptions.h"
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#include "debug.h"
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#include "log.h"
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#include "porting.h"
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#include "util/container.h"
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#include "util/thread.h"
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#include "version.h"
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#include "settings.h"
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#include "noise.h"
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static std::mutex g_httpfetch_mutex;
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static std::unordered_map<u64, std::queue<HTTPFetchResult>>
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g_httpfetch_results;
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static PcgRandom g_callerid_randomness;
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HTTPFetchRequest::HTTPFetchRequest() :
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timeout(g_settings->getS32("curl_timeout")),
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connect_timeout(10 * 1000),
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useragent(std::string(PROJECT_NAME_C "/") + g_version_hash + " (" + porting::get_sysinfo() + ")")
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{
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timeout = std::max(timeout, MIN_HTTPFETCH_TIMEOUT_INTERACTIVE);
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}
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static void httpfetch_deliver_result(const HTTPFetchResult &fetch_result)
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{
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u64 caller = fetch_result.caller;
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if (caller != HTTPFETCH_DISCARD) {
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MutexAutoLock lock(g_httpfetch_mutex);
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g_httpfetch_results[caller].emplace(fetch_result);
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}
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}
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static void httpfetch_request_clear(u64 caller);
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u64 httpfetch_caller_alloc()
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{
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MutexAutoLock lock(g_httpfetch_mutex);
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// Check each caller ID except reserved ones
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for (u64 caller = HTTPFETCH_CID_START; caller != 0; ++caller) {
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auto it = g_httpfetch_results.find(caller);
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if (it == g_httpfetch_results.end()) {
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verbosestream << "httpfetch_caller_alloc: allocating "
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<< caller << std::endl;
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// Access element to create it
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g_httpfetch_results[caller];
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return caller;
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}
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}
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FATAL_ERROR("httpfetch_caller_alloc: ran out of caller IDs");
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}
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u64 httpfetch_caller_alloc_secure()
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{
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MutexAutoLock lock(g_httpfetch_mutex);
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// Generate random caller IDs and make sure they're not
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// already used or reserved.
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// Give up after 100 tries to prevent infinite loop
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size_t tries = 100;
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u64 caller;
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do {
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caller = (((u64) g_callerid_randomness.next()) << 32) |
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g_callerid_randomness.next();
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if (--tries < 1) {
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FATAL_ERROR("httpfetch_caller_alloc_secure: ran out of caller IDs");
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return HTTPFETCH_DISCARD;
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}
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} while (caller >= HTTPFETCH_CID_START &&
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g_httpfetch_results.find(caller) != g_httpfetch_results.end());
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verbosestream << "httpfetch_caller_alloc_secure: allocating "
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<< caller << std::endl;
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// Access element to create it
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g_httpfetch_results[caller];
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return caller;
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}
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void httpfetch_caller_free(u64 caller)
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{
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verbosestream<<"httpfetch_caller_free: freeing "
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<<caller<<std::endl;
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httpfetch_request_clear(caller);
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if (caller != HTTPFETCH_DISCARD) {
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MutexAutoLock lock(g_httpfetch_mutex);
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g_httpfetch_results.erase(caller);
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}
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}
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bool httpfetch_async_get(u64 caller, HTTPFetchResult &fetch_result)
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{
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MutexAutoLock lock(g_httpfetch_mutex);
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// Check that caller exists
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auto it = g_httpfetch_results.find(caller);
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if (it == g_httpfetch_results.end())
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return false;
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// Check that result queue is nonempty
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std::queue<HTTPFetchResult> &caller_results = it->second;
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if (caller_results.empty())
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return false;
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// Pop first result
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fetch_result = std::move(caller_results.front());
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caller_results.pop();
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return true;
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}
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#if USE_CURL
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#include <curl/curl.h>
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/*
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USE_CURL is on: use cURL based httpfetch implementation
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*/
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static size_t httpfetch_writefunction(
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char *ptr, size_t size, size_t nmemb, void *userdata)
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{
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auto *dest = reinterpret_cast<std::string*>(userdata);
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size_t count = size * nmemb;
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dest->append(ptr, count);
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return count;
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}
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static size_t httpfetch_discardfunction(
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char *ptr, size_t size, size_t nmemb, void *userdata)
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{
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return size * nmemb;
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}
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class CurlHandlePool
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{
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std::vector<CURL*> handles;
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public:
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CurlHandlePool() = default;
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~CurlHandlePool()
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{
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for (CURL *it : handles) {
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curl_easy_cleanup(it);
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}
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}
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CURL * alloc()
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{
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CURL *curl;
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if (handles.empty()) {
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curl = curl_easy_init();
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if (!curl)
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throw std::bad_alloc();
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} else {
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curl = handles.back();
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handles.pop_back();
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}
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return curl;
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}
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void free(CURL *handle)
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{
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if (handle)
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handles.push_back(handle);
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}
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};
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class HTTPFetchOngoing
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{
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public:
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HTTPFetchOngoing(const HTTPFetchRequest &request, CurlHandlePool *pool);
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~HTTPFetchOngoing();
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CURLcode start(CURLM *multi);
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const HTTPFetchResult * complete(CURLcode res);
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const HTTPFetchRequest &getRequest() const { return request; };
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const CURL *getEasyHandle() const { return curl; };
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private:
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CurlHandlePool *pool;
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CURL *curl = nullptr;
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CURLM *multi = nullptr;
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HTTPFetchRequest request;
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HTTPFetchResult result;
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struct curl_slist *http_header = nullptr;
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curl_mime *multipart_mime = nullptr;
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};
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HTTPFetchOngoing::HTTPFetchOngoing(const HTTPFetchRequest &request_,
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CurlHandlePool *pool_):
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pool(pool_),
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request(request_),
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result(request_)
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{
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curl = pool->alloc();
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if (!curl)
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return;
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// Set static cURL options
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curl_easy_setopt(curl, CURLOPT_NOSIGNAL, 1);
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curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1);
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curl_easy_setopt(curl, CURLOPT_MAXREDIRS, 3);
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curl_easy_setopt(curl, CURLOPT_ACCEPT_ENCODING, ""); // = all supported ones
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std::string bind_address = g_settings->get("bind_address");
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if (!bind_address.empty()) {
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curl_easy_setopt(curl, CURLOPT_INTERFACE, bind_address.c_str());
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}
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if (!g_settings->getBool("enable_ipv6")) {
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curl_easy_setopt(curl, CURLOPT_IPRESOLVE, CURL_IPRESOLVE_V4);
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}
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// Restrict protocols so that curl vulnerabilities in
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// other protocols don't affect us.
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#if LIBCURL_VERSION_NUM >= 0x075500
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// These settings were introduced in curl 7.85.0.
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const char *protocols = "HTTP,HTTPS,FTP,FTPS";
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curl_easy_setopt(curl, CURLOPT_PROTOCOLS_STR, protocols);
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curl_easy_setopt(curl, CURLOPT_REDIR_PROTOCOLS_STR, protocols);
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#elif LIBCURL_VERSION_NUM >= 0x071304
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// These settings were introduced in curl 7.19.4, and later deprecated.
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long protocols =
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CURLPROTO_HTTP |
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CURLPROTO_HTTPS |
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CURLPROTO_FTP |
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CURLPROTO_FTPS;
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curl_easy_setopt(curl, CURLOPT_PROTOCOLS, protocols);
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curl_easy_setopt(curl, CURLOPT_REDIR_PROTOCOLS, protocols);
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#endif
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// Set cURL options based on HTTPFetchRequest
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curl_easy_setopt(curl, CURLOPT_URL,
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request.url.c_str());
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curl_easy_setopt(curl, CURLOPT_TIMEOUT_MS,
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request.timeout);
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curl_easy_setopt(curl, CURLOPT_CONNECTTIMEOUT_MS,
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request.connect_timeout);
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if (!request.useragent.empty())
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curl_easy_setopt(curl, CURLOPT_USERAGENT, request.useragent.c_str());
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// Set up a write callback that writes to the
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// result struct, unless the data is to be discarded
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if (request.caller == HTTPFETCH_DISCARD) {
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curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION,
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httpfetch_discardfunction);
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curl_easy_setopt(curl, CURLOPT_WRITEDATA, nullptr);
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} else {
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curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION,
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httpfetch_writefunction);
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curl_easy_setopt(curl, CURLOPT_WRITEDATA, &result.data);
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}
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// Set data from fields or raw_data
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if (request.multipart) {
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multipart_mime = curl_mime_init(curl);
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for (auto &it : request.fields) {
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curl_mimepart *part = curl_mime_addpart(multipart_mime);
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curl_mime_name(part, it.first.c_str());
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curl_mime_data(part, it.second.c_str(), it.second.size());
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}
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curl_easy_setopt(curl, CURLOPT_MIMEPOST, multipart_mime);
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} else {
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switch (request.method) {
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case HTTP_GET:
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curl_easy_setopt(curl, CURLOPT_HTTPGET, 1);
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break;
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case HTTP_POST:
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curl_easy_setopt(curl, CURLOPT_POST, 1);
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break;
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case HTTP_PUT:
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curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, "PUT");
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break;
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case HTTP_DELETE:
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curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, "DELETE");
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break;
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}
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if (request.method != HTTP_GET) {
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if (!request.raw_data.empty()) {
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curl_easy_setopt(curl, CURLOPT_POSTFIELDSIZE,
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request.raw_data.size());
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curl_easy_setopt(curl, CURLOPT_POSTFIELDS,
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request.raw_data.c_str());
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} else if (!request.fields.empty()) {
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std::string str;
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for (auto &field : request.fields) {
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if (!str.empty())
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str += "&";
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str += urlencode(field.first);
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str += "=";
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str += urlencode(field.second);
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}
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curl_easy_setopt(curl, CURLOPT_POSTFIELDSIZE,
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str.size());
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curl_easy_setopt(curl, CURLOPT_COPYPOSTFIELDS,
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str.c_str());
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}
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}
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}
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// Set additional HTTP headers
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for (const std::string &extra_header : request.extra_headers) {
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http_header = curl_slist_append(http_header, extra_header.c_str());
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}
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curl_easy_setopt(curl, CURLOPT_HTTPHEADER, http_header);
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if (!g_settings->getBool("curl_verify_cert")) {
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curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, false);
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}
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}
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CURLcode HTTPFetchOngoing::start(CURLM *multi_)
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{
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if (!curl)
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return CURLE_FAILED_INIT;
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if (!multi_) {
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// Easy interface (sync)
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return curl_easy_perform(curl);
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}
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// Multi interface (async)
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CURLMcode mres = curl_multi_add_handle(multi_, curl);
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if (mres != CURLM_OK) {
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errorstream << "curl_multi_add_handle"
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<< " returned error code " << mres
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<< std::endl;
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return CURLE_FAILED_INIT;
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}
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multi = multi_; // store for curl_multi_remove_handle
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return CURLE_OK;
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}
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const HTTPFetchResult * HTTPFetchOngoing::complete(CURLcode res)
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{
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result.succeeded = (res == CURLE_OK);
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result.timeout = (res == CURLE_OPERATION_TIMEDOUT);
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// Get HTTP/FTP response code
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result.response_code = 0;
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if (curl && (curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE,
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&result.response_code) != CURLE_OK)) {
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// We failed to get a return code, make sure it is still 0
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result.response_code = 0;
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}
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if (res != CURLE_OK) {
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errorstream << "HTTPFetch for " << request.url << " failed: "
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<< curl_easy_strerror(res);
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if (result.timeout)
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errorstream << " (timeout = " << request.timeout << "ms)" << std::endl;
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errorstream << std::endl;
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} else if (result.response_code >= 400) {
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errorstream << "HTTPFetch for " << request.url
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<< " returned response code " << result.response_code
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<< std::endl;
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if (result.caller == HTTPFETCH_PRINT_ERR && !result.data.empty()) {
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errorstream << "Response body:" << std::endl;
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safe_print_string(errorstream, result.data);
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errorstream << std::endl;
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}
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}
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return &result;
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}
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HTTPFetchOngoing::~HTTPFetchOngoing()
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{
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if (multi) {
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CURLMcode mres = curl_multi_remove_handle(multi, curl);
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if (mres != CURLM_OK) {
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errorstream << "curl_multi_remove_handle"
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<< " returned error code " << mres
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<< std::endl;
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}
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}
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// Set safe options for the reusable cURL handle
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curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION,
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httpfetch_discardfunction);
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curl_easy_setopt(curl, CURLOPT_USERAGENT, nullptr);
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curl_easy_setopt(curl, CURLOPT_WRITEDATA, nullptr);
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curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, nullptr);
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curl_easy_setopt(curl, CURLOPT_POSTFIELDS, nullptr);
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if (http_header) {
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curl_easy_setopt(curl, CURLOPT_HTTPHEADER, nullptr);
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curl_slist_free_all(http_header);
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}
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if (multipart_mime) {
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curl_easy_setopt(curl, CURLOPT_MIMEPOST, nullptr);
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curl_mime_free(multipart_mime);
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}
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// Store the cURL handle for reuse
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pool->free(curl);
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}
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#if LIBCURL_VERSION_NUM >= 0x074200
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#define HAVE_CURL_MULTI_POLL
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#else
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#undef HAVE_CURL_MULTI_POLL
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#endif
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class CurlFetchThread : public Thread
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{
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protected:
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enum RequestType {
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RT_FETCH,
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RT_CLEAR,
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RT_WAKEUP,
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};
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struct Request {
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RequestType type;
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HTTPFetchRequest fetch_request;
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Event *event = nullptr;
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};
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CURLM *m_multi;
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MutexedQueue<Request> m_requests;
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size_t m_parallel_limit;
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// Variables exclusively used within thread
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std::vector<std::unique_ptr<HTTPFetchOngoing>> m_all_ongoing;
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std::list<HTTPFetchRequest> m_queued_fetches;
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public:
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CurlFetchThread(int parallel_limit) :
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Thread("CurlFetch")
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{
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if (parallel_limit >= 1)
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m_parallel_limit = parallel_limit;
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else
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m_parallel_limit = 1;
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}
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void requestFetch(const HTTPFetchRequest &fetch_request)
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{
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Request req;
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req.type = RT_FETCH;
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req.fetch_request = fetch_request;
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m_requests.push_back(std::move(req));
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}
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void requestClear(u64 caller, Event *event)
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{
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Request req;
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req.type = RT_CLEAR;
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req.fetch_request.caller = caller;
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req.event = event;
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m_requests.push_back(std::move(req));
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}
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void requestWakeUp()
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{
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Request req;
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req.type = RT_WAKEUP;
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m_requests.push_back(std::move(req));
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}
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protected:
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// Handle a request from some other thread
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// E.g. new fetch; clear fetches for one caller; wake up
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void processRequest(Request &req)
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{
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if (req.type == RT_FETCH) {
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// New fetch, queue until there are less
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// than m_parallel_limit ongoing fetches
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m_queued_fetches.push_back(std::move(req.fetch_request));
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// see processQueued() for what happens next
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} else if (req.type == RT_CLEAR) {
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u64 caller = req.fetch_request.caller;
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// Abort all ongoing fetches for the caller
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for (auto it = m_all_ongoing.begin(); it != m_all_ongoing.end();) {
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if ((*it)->getRequest().caller == caller) {
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it = m_all_ongoing.erase(it);
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} else {
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++it;
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}
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}
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// Also abort all queued fetches for the caller
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for (auto it = m_queued_fetches.begin();
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it != m_queued_fetches.end();) {
|
|
if ((*it).caller == caller)
|
|
it = m_queued_fetches.erase(it);
|
|
else
|
|
++it;
|
|
}
|
|
} else if (req.type == RT_WAKEUP) {
|
|
// Wakeup: Nothing to do, thread is awake at this point
|
|
}
|
|
|
|
if (req.event)
|
|
req.event->signal();
|
|
}
|
|
|
|
// Start new ongoing fetches if m_parallel_limit allows
|
|
void processQueued(CurlHandlePool *pool)
|
|
{
|
|
while (m_all_ongoing.size() < m_parallel_limit &&
|
|
!m_queued_fetches.empty()) {
|
|
HTTPFetchRequest request = std::move(m_queued_fetches.front());
|
|
m_queued_fetches.pop_front();
|
|
|
|
// Create ongoing fetch data and make a cURL handle
|
|
// Set cURL options based on HTTPFetchRequest
|
|
auto ongoing = std::make_unique<HTTPFetchOngoing>(request, pool);
|
|
|
|
// Initiate the connection (curl_multi_add_handle)
|
|
CURLcode res = ongoing->start(m_multi);
|
|
if (res == CURLE_OK) {
|
|
m_all_ongoing.push_back(std::move(ongoing));
|
|
} else {
|
|
httpfetch_deliver_result(*ongoing->complete(res));
|
|
}
|
|
}
|
|
}
|
|
|
|
// Process CURLMsg (indicates completion of a fetch)
|
|
void processCurlMessage(CURLMsg *msg)
|
|
{
|
|
if (msg->msg != CURLMSG_DONE)
|
|
return;
|
|
// Determine which ongoing fetch the message pertains to
|
|
for (auto it = m_all_ongoing.begin(); it != m_all_ongoing.end(); ++it) {
|
|
auto &ongoing = **it;
|
|
if (ongoing.getEasyHandle() != msg->easy_handle)
|
|
continue;
|
|
httpfetch_deliver_result(*ongoing.complete(msg->data.result));
|
|
m_all_ongoing.erase(it);
|
|
return;
|
|
}
|
|
}
|
|
|
|
// Wait for a request from another thread, or timeout elapses
|
|
void waitForRequest(long timeout)
|
|
{
|
|
if (m_queued_fetches.empty()) {
|
|
try {
|
|
Request req = m_requests.pop_front(timeout);
|
|
processRequest(req);
|
|
}
|
|
catch (ItemNotFoundException &e) {}
|
|
}
|
|
}
|
|
|
|
// Wait until some IO happens, or timeout elapses
|
|
void waitForIO(long timeout)
|
|
{
|
|
CURLMcode mres;
|
|
|
|
#ifdef HAVE_CURL_MULTI_POLL
|
|
mres = curl_multi_poll(m_multi, nullptr, 0, timeout, nullptr);
|
|
|
|
if (mres != CURLM_OK) {
|
|
errorstream << "curl_multi_poll returned error code "
|
|
<< mres << std::endl;
|
|
}
|
|
#else
|
|
// If there's nothing to do curl_multi_wait() will immediately return
|
|
// so we have to emulate the sleeping.
|
|
|
|
fd_set dummy;
|
|
int max_fd;
|
|
mres = curl_multi_fdset(m_multi, &dummy, &dummy, &dummy, &max_fd);
|
|
if (mres != CURLM_OK) {
|
|
errorstream << "curl_multi_fdset returned error code "
|
|
<< mres << std::endl;
|
|
max_fd = -1;
|
|
}
|
|
|
|
if (max_fd == -1) { // curl has nothing to wait for
|
|
if (timeout > 0)
|
|
sleep_ms(timeout);
|
|
} else {
|
|
mres = curl_multi_wait(m_multi, nullptr, 0, timeout, nullptr);
|
|
|
|
if (mres != CURLM_OK) {
|
|
errorstream << "curl_multi_wait returned error code "
|
|
<< mres << std::endl;
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
|
|
void *run()
|
|
{
|
|
CurlHandlePool pool;
|
|
|
|
m_multi = curl_multi_init();
|
|
FATAL_ERROR_IF(!m_multi, "curl_multi_init returned NULL");
|
|
|
|
FATAL_ERROR_IF(!m_all_ongoing.empty(), "Expected empty");
|
|
|
|
while (!stopRequested()) {
|
|
BEGIN_DEBUG_EXCEPTION_HANDLER
|
|
|
|
/*
|
|
Handle new async requests
|
|
*/
|
|
|
|
while (!m_requests.empty()) {
|
|
Request req = m_requests.pop_frontNoEx();
|
|
processRequest(req);
|
|
}
|
|
processQueued(&pool);
|
|
|
|
/*
|
|
Handle ongoing async requests
|
|
*/
|
|
|
|
int still_ongoing = 0;
|
|
while (curl_multi_perform(m_multi, &still_ongoing) ==
|
|
CURLM_CALL_MULTI_PERFORM)
|
|
/* noop */;
|
|
|
|
/*
|
|
Handle completed async requests
|
|
*/
|
|
if (still_ongoing < (int) m_all_ongoing.size()) {
|
|
CURLMsg *msg;
|
|
int msgs_in_queue;
|
|
msg = curl_multi_info_read(m_multi, &msgs_in_queue);
|
|
while (msg != NULL) {
|
|
processCurlMessage(msg);
|
|
msg = curl_multi_info_read(m_multi, &msgs_in_queue);
|
|
}
|
|
}
|
|
|
|
/*
|
|
If there are ongoing requests, wait for data
|
|
(with a timeout of 100ms so that new requests
|
|
can be processed).
|
|
|
|
If no ongoing requests, wait for a new request.
|
|
(Possibly an empty request that signals
|
|
that the thread should be stopped.)
|
|
*/
|
|
if (m_all_ongoing.empty())
|
|
waitForRequest(100000000);
|
|
else
|
|
waitForIO(100);
|
|
|
|
END_DEBUG_EXCEPTION_HANDLER
|
|
}
|
|
|
|
// Call curl_multi_remove_handle and cleanup easy handles
|
|
m_all_ongoing.clear();
|
|
|
|
m_queued_fetches.clear();
|
|
|
|
CURLMcode mres = curl_multi_cleanup(m_multi);
|
|
if (mres != CURLM_OK) {
|
|
errorstream<<"curl_multi_cleanup"
|
|
<<" returned error code "<<mres
|
|
<<std::endl;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
};
|
|
|
|
static std::unique_ptr<CurlFetchThread> g_httpfetch_thread;
|
|
|
|
void httpfetch_init(int parallel_limit)
|
|
{
|
|
FATAL_ERROR_IF(g_httpfetch_thread, "httpfetch_init called twice");
|
|
|
|
verbosestream<<"httpfetch_init: parallel_limit="<<parallel_limit
|
|
<<std::endl;
|
|
|
|
CURLcode res = curl_global_init(CURL_GLOBAL_DEFAULT);
|
|
FATAL_ERROR_IF(res != CURLE_OK, "cURL init failed");
|
|
|
|
g_httpfetch_thread = std::make_unique<CurlFetchThread>(parallel_limit);
|
|
|
|
// Initialize g_callerid_randomness for httpfetch_caller_alloc_secure
|
|
u64 randbuf[2];
|
|
porting::secure_rand_fill_buf(randbuf, sizeof(u64) * 2);
|
|
g_callerid_randomness = PcgRandom(randbuf[0], randbuf[1]);
|
|
}
|
|
|
|
void httpfetch_cleanup()
|
|
{
|
|
verbosestream<<"httpfetch_cleanup: cleaning up"<<std::endl;
|
|
|
|
if (g_httpfetch_thread) {
|
|
g_httpfetch_thread->stop();
|
|
g_httpfetch_thread->requestWakeUp();
|
|
g_httpfetch_thread->wait();
|
|
g_httpfetch_thread.reset();
|
|
}
|
|
|
|
curl_global_cleanup();
|
|
}
|
|
|
|
void httpfetch_async(const HTTPFetchRequest &fetch_request)
|
|
{
|
|
g_httpfetch_thread->requestFetch(fetch_request);
|
|
if (!g_httpfetch_thread->isRunning())
|
|
g_httpfetch_thread->start();
|
|
}
|
|
|
|
static void httpfetch_request_clear(u64 caller)
|
|
{
|
|
if (g_httpfetch_thread->isRunning()) {
|
|
Event event;
|
|
g_httpfetch_thread->requestClear(caller, &event);
|
|
event.wait();
|
|
} else {
|
|
g_httpfetch_thread->requestClear(caller, nullptr);
|
|
}
|
|
}
|
|
|
|
static void httpfetch_sync(const HTTPFetchRequest &fetch_request,
|
|
HTTPFetchResult &fetch_result)
|
|
{
|
|
// Create ongoing fetch data and make a cURL handle
|
|
// Set cURL options based on HTTPFetchRequest
|
|
CurlHandlePool pool;
|
|
HTTPFetchOngoing ongoing(fetch_request, &pool);
|
|
// Do the fetch (curl_easy_perform)
|
|
CURLcode res = ongoing.start(nullptr);
|
|
// Update fetch result
|
|
fetch_result = *ongoing.complete(res);
|
|
}
|
|
|
|
bool httpfetch_sync_interruptible(const HTTPFetchRequest &fetch_request,
|
|
HTTPFetchResult &fetch_result, long interval)
|
|
{
|
|
if (Thread *thread = Thread::getCurrentThread()) {
|
|
HTTPFetchRequest req = fetch_request;
|
|
req.caller = httpfetch_caller_alloc_secure();
|
|
httpfetch_async(req);
|
|
do {
|
|
if (thread->stopRequested()) {
|
|
httpfetch_caller_free(req.caller);
|
|
fetch_result = HTTPFetchResult(fetch_request);
|
|
return false;
|
|
}
|
|
sleep_ms(interval);
|
|
} while (!httpfetch_async_get(req.caller, fetch_result));
|
|
httpfetch_caller_free(req.caller);
|
|
} else {
|
|
httpfetch_sync(fetch_request, fetch_result);
|
|
}
|
|
return true;
|
|
}
|
|
|
|
#else // USE_CURL
|
|
|
|
/*
|
|
USE_CURL is off:
|
|
|
|
Dummy httpfetch implementation that always returns an error.
|
|
*/
|
|
|
|
void httpfetch_init(int parallel_limit)
|
|
{
|
|
}
|
|
|
|
void httpfetch_cleanup()
|
|
{
|
|
}
|
|
|
|
void httpfetch_async(const HTTPFetchRequest &fetch_request)
|
|
{
|
|
errorstream << "httpfetch_async: unable to fetch " << fetch_request.url
|
|
<< " because USE_CURL=0" << std::endl;
|
|
|
|
HTTPFetchResult fetch_result(fetch_request); // sets succeeded = false etc.
|
|
httpfetch_deliver_result(fetch_result);
|
|
}
|
|
|
|
static void httpfetch_request_clear(u64 caller)
|
|
{
|
|
}
|
|
|
|
bool httpfetch_sync_interruptible(const HTTPFetchRequest &fetch_request,
|
|
HTTPFetchResult &fetch_result, long interval)
|
|
{
|
|
errorstream << "httpfetch_sync_interruptible: unable to fetch " << fetch_request.url
|
|
<< " because USE_CURL=0" << std::endl;
|
|
|
|
fetch_result = HTTPFetchResult(fetch_request); // sets succeeded = false etc.
|
|
return false;
|
|
}
|
|
|
|
#endif // USE_CURL
|