Replace any direct curl usage by httpfetch

minetest.conf.example

@@ -198,7 +198,6 @@
 # - Media fetch if server uses remote_media setting
 # - Serverlist download and server announcement
 # - Downloads performed by main menu (e.g. mod manager)
-# - Downloads performed by mods (minetest.httpfetch)
 # Only has an effect if compiled with cURL
 #curl_parallel_limit = 8
 

src/convert_json.cpp

@@ -28,58 +28,38 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "main.h" // for g_settings
 #include "settings.h"
 #include "version.h"
-
+#include "httpfetch.h"
-#if USE_CURL
-#include <curl/curl.h>
-
-static size_t WriteCallback(void *contents, size_t size, size_t nmemb, void *userp)
-{
-    ((std::string*)userp)->append((char*)contents, size * nmemb);
-    return size * nmemb;
-}
-
-#endif
 
 Json::Value                 fetchJsonValue(const std::string url,
 													struct curl_slist *chunk) {
 #if USE_CURL
-	std::string liststring;
-	CURL *curl;
 
-	curl = curl_easy_init();
+	HTTPFetchRequest fetchrequest;
-	if (curl)
+	HTTPFetchResult fetchresult;
-	{
+	fetchrequest.url = url;
-		CURLcode res;
+	fetchrequest.useragent = std::string("Minetest ")+minetest_version_hash;
+	fetchrequest.timeout = g_settings->getS32("curl_timeout");
+	fetchrequest.caller = HTTPFETCH_SYNC;
 
-		curl_easy_setopt(curl, CURLOPT_NOSIGNAL, 1);
+	struct curl_slist* runptr = chunk;
-		curl_easy_setopt(curl, CURLOPT_URL, url.c_str());
+	while(runptr) {
-		curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, WriteCallback);
+		fetchrequest.extra_headers.push_back(runptr->data);
-		curl_easy_setopt(curl, CURLOPT_WRITEDATA, &liststring);
+		runptr = runptr->next;
-		curl_easy_setopt(curl, CURLOPT_TIMEOUT_MS, g_settings->getS32("curl_timeout"));
-		curl_easy_setopt(curl, CURLOPT_CONNECTTIMEOUT_MS, g_settings->getS32("curl_timeout"));
-		curl_easy_setopt(curl, CURLOPT_USERAGENT, (std::string("Minetest ")+minetest_version_hash).c_str());
-
-		if (chunk != 0)
-			curl_easy_setopt(curl, CURLOPT_HTTPHEADER, chunk);
-
-		res = curl_easy_perform(curl);
-		if (res != CURLE_OK)
-			errorstream<<"Jsonreader: "<< url <<" not found (" << curl_easy_strerror(res) << ")" <<std::endl;
-		curl_easy_cleanup(curl);
 	}
+	httpfetch_sync(fetchrequest,fetchresult);
 
-	Json::Value root;
+	if (!fetchresult.succeeded) {
-	Json::Reader reader;
-	std::istringstream stream(liststring);
-	if (!liststring.size()) {
 		return Json::Value();
 	}
+	Json::Value root;
+	Json::Reader reader;
+	std::istringstream stream(fetchresult.data);
 
 	if (!reader.parse( stream, root ) )
 	{
 		errorstream << "URL: " << url << std::endl;
 		errorstream << "Failed to parse json data " << reader.getFormattedErrorMessages();
-		errorstream << "data: \"" << liststring << "\"" << std::endl;
+		errorstream << "data: \"" << fetchresult.data << "\"" << std::endl;
 		return Json::Value();
 	}
 

src/guiEngine.cpp

@@ -30,6 +30,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "sound.h"
 #include "sound_openal.h"
 #include "clouds.h"
+#include "httpfetch.h"
 
 #include <IGUIStaticText.h>
 #include <ICameraSceneNode.h>
@@ -507,38 +508,27 @@ bool GUIEngine::setTexture(texture_layer layer,std::string texturepath) {
 }
 
 /******************************************************************************/
-#if USE_CURL
-static size_t WriteCallback(void *contents, size_t size, size_t nmemb, void *userp)
-{
-	FILE* targetfile = (FILE*) userp;
-	fwrite(contents,size,nmemb,targetfile);
-	return size * nmemb;
-}
-#endif
 bool GUIEngine::downloadFile(std::string url,std::string target) {
 #if USE_CURL
-	//download file via curl
-	CURL *curl;
-
-	curl = curl_easy_init();
-
-	if (curl)
-	{
-		CURLcode res;
 	bool retval = true;
 
 	FILE* targetfile = fopen(target.c_str(),"wb");
 
 	if (targetfile) {
-			curl_easy_setopt(curl, CURLOPT_NOSIGNAL, 1);
+		HTTPFetchRequest fetchrequest;
-			curl_easy_setopt(curl, CURLOPT_URL, url.c_str());
+		HTTPFetchResult fetchresult;
-			curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, WriteCallback);
+		fetchrequest.url = url;
-			curl_easy_setopt(curl, CURLOPT_WRITEDATA, targetfile);
+		fetchrequest.useragent = std::string("Minetest ")+minetest_version_hash;
-			curl_easy_setopt(curl, CURLOPT_USERAGENT, (std::string("Minetest ")+minetest_version_hash).c_str());
+		fetchrequest.timeout = g_settings->getS32("curl_timeout");
-			res = curl_easy_perform(curl);
+		fetchrequest.caller = HTTPFETCH_SYNC;
-			if (res != CURLE_OK) {
+		httpfetch_sync(fetchrequest,fetchresult);
-				errorstream << "File at url \"" << url
+
-					<<"\" not found (" << curl_easy_strerror(res) << ")" <<std::endl;
+		if (fetchresult.succeeded) {
+			if (fwrite(fetchresult.data.c_str(),1,fetchresult.data.size(),targetfile) != fetchresult.data.size()) {
+				retval = false;
+			}
+		}
+		else {
 			retval = false;
 		}
 		fclose(targetfile);
@@ -547,11 +537,10 @@ bool GUIEngine::downloadFile(std::string url,std::string target) {
 		retval = false;
 	}
 
-		curl_easy_cleanup(curl);
 	return retval;
-	}
+#else
-#endif
 	return false;
+#endif
 }
 
 /******************************************************************************/

src/guiFormSpecMenu.cpp

@@ -40,6 +40,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "log.h"
 #include "tile.h" // ITextureSource
 #include "hud.h" // drawItemStack
+#include "hex.h"
 #include "util/string.h"
 #include "util/numeric.h"
 #include "filesys.h"
@@ -2736,19 +2737,6 @@ bool GUIFormSpecMenu::OnEvent(const SEvent& event)
 	return Parent ? Parent->OnEvent(event) : false;
 }
 
-static inline bool hex_digit_decode(char hexdigit, unsigned char &value)
-{
-	if(hexdigit >= '0' && hexdigit <= '9')
-		value = hexdigit - '0';
-	else if(hexdigit >= 'A' && hexdigit <= 'F')
-		value = hexdigit - 'A' + 10;
-	else if(hexdigit >= 'a' && hexdigit <= 'f')
-		value = hexdigit - 'a' + 10;
-	else
-		return false;
-	return true;
-}
-
 bool GUIFormSpecMenu::parseColor(std::string &value, video::SColor &color, bool quiet)
 {
 	const char *hexpattern = NULL;

src/httpfetch.cpp

@@ -280,6 +280,7 @@ struct HTTPFetchOngoing
 		if (curl != NULL) {
 			if (curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE,
 					&result.response_code) != CURLE_OK) {
+				//we failed to get a return code make sure it is still 0
 				result.response_code = 0;
 			}
 		}

src/httpfetch.h

@@ -27,6 +27,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 // Can be used in place of "caller" in asynchronous transfers to discard result
 // (used as default value of "caller")
 #define HTTPFETCH_DISCARD 0
+#define HTTPFETCH_SYNC 1
 
 struct HTTPFetchRequest
 {
@@ -96,6 +97,7 @@ struct HTTPFetchResult
 		caller = fetchrequest.caller;
 		request_id = fetchrequest.request_id;
 	}
+
 };
 
 // Initializes the httpfetch module