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115 lines
3.5 KiB
C++
115 lines
3.5 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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#pragma once
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#include <vector>
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#include "util/string.h"
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#include "config.h"
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// Can be used in place of "caller" in asynchronous transfers to discard result
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// (used as default value of "caller")
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#define HTTPFETCH_DISCARD 0
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#define HTTPFETCH_SYNC 1
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struct HTTPFetchRequest
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{
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std::string url = "";
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// Identifies the caller (for asynchronous requests)
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// Ignored by httpfetch_sync
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unsigned long caller = HTTPFETCH_DISCARD;
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// Some number that identifies the request
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// (when the same caller issues multiple httpfetch_async calls)
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unsigned long request_id = 0;
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// Timeout for the whole transfer, in milliseconds
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long timeout;
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// Timeout for the connection phase, in milliseconds
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long connect_timeout;
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// Indicates if this is multipart/form-data or
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// application/x-www-form-urlencoded. POST-only.
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bool multipart = false;
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// POST fields. Fields are escaped properly.
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// If this is empty a GET request is done instead.
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StringMap post_fields;
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// Raw POST data, overrides post_fields.
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std::string post_data;
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// If not empty, should contain entries such as "Accept: text/html"
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std::vector<std::string> extra_headers;
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// useragent to use
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std::string useragent;
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HTTPFetchRequest();
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};
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struct HTTPFetchResult
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{
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bool succeeded = false;
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bool timeout = false;
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long response_code = 0;
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std::string data = "";
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// The caller and request_id from the corresponding HTTPFetchRequest.
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unsigned long caller = HTTPFETCH_DISCARD;
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unsigned long request_id = 0;
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HTTPFetchResult() = default;
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HTTPFetchResult(const HTTPFetchRequest &fetch_request) :
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caller(fetch_request.caller), request_id(fetch_request.request_id)
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{
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}
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};
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// Initializes the httpfetch module
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void httpfetch_init(int parallel_limit);
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// Stops the httpfetch thread and cleans up resources
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void httpfetch_cleanup();
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// Starts an asynchronous HTTP fetch request
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void httpfetch_async(const HTTPFetchRequest &fetch_request);
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// If any fetch for the given caller ID is complete, removes it from the
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// result queue, sets the fetch result and returns true. Otherwise returns false.
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bool httpfetch_async_get(unsigned long caller, HTTPFetchResult &fetch_result);
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// Allocates a caller ID for httpfetch_async
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// Not required if you want to set caller = HTTPFETCH_DISCARD
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unsigned long httpfetch_caller_alloc();
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// Allocates a non-predictable caller ID for httpfetch_async
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unsigned long httpfetch_caller_alloc_secure();
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// Frees a caller ID allocated with httpfetch_caller_alloc
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// Note: This can be expensive, because the httpfetch thread is told
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// to stop any ongoing fetches for the given caller.
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void httpfetch_caller_free(unsigned long caller);
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// Performs a synchronous HTTP request. This blocks and therefore should
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// only be used from background threads.
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void httpfetch_sync(const HTTPFetchRequest &fetch_request, HTTPFetchResult &fetch_result);
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