增加http代理功能 (#2988)

支持通过http代理拉流, 避免内外网复杂网络环境时需要专门配置防火墙,现在只需要配置一台代理内网的服务器.

---------

Co-authored-by: xia-chu <771730766@qq.com>

src/Common/Parser.cpp

@@ -11,7 +11,7 @@
 #include <cinttypes>
 #include "Parser.h"
 #include "strCoding.h"
-#include "macros.h"
+#include "Util/base64.h"
 #include "Network/sockutil.h"
 #include "Common/macros.h"
 
@@ -325,6 +325,25 @@ void splitUrl(const std::string &url, std::string &host, uint16_t &port) {
     host = url.substr(0, pos);
     checkHost(host);
 }
+
+void parseProxyUrl(const std::string &proxy_url, std::string &proxy_host, uint16_t &proxy_port, std::string &proxy_auth) {
+    // 判断是否包含http://, 如果是则去掉
+    std::string host;
+    auto pos = proxy_url.find("://");
+    if (pos != string::npos) {
+        host = proxy_url.substr(pos + 3);
+    } else {
+        host = proxy_url;
+    }
+    // 判断是否包含用户名和密码
+    pos = host.rfind('@');
+    if (pos != string::npos) {
+        proxy_auth = encodeBase64(host.substr(0, pos));
+        host = host.substr(pos + 1, host.size());
+    }
+    splitUrl(host, proxy_host, proxy_port);
+}
+
 #if 0
 //测试代码
 static onceToken token([](){

src/Common/Parser.h

@@ -21,6 +21,8 @@ namespace mediakit {
 std::string findSubString(const char *buf, const char *start, const char *end, size_t buf_size = 0);
 // 把url解析为主机地址和端口号,兼容ipv4/ipv6/dns
 void splitUrl(const std::string &url, std::string &host, uint16_t &port);
+// 解析proxy url,仅支持http
+void parseProxyUrl(const std::string &proxy_url, std::string &proxy_host, uint16_t &proxy_port, std::string &proxy_auth);
 
 struct StrCaseCompare {
     bool operator()(const std::string &__x, const std::string &__y) const { return strcasecmp(__x.data(), __y.data()) < 0; }

src/Common/config.cpp

@@ -353,6 +353,7 @@ const string kBeatIntervalMS = "beat_interval_ms";
 const string kBenchmarkMode = "benchmark_mode";
 const string kWaitTrackReady = "wait_track_ready";
 const string kPlayTrack = "play_track";
+const string kProxyUrl = "proxy_url";
 } // namespace Client
 
 } // namespace mediakit

src/Common/config.h

@@ -403,6 +403,8 @@ extern const std::string kWaitTrackReady;
 // rtsp播放指定track，可选项有0(不指定，默认)、1(视频)、2(音频)
 // 设置方法:player[Client::kPlayTrack] = 0/1/2;
 extern const std::string kPlayTrack;
+//设置代理url，目前只支持http协议
+extern const std::string kProxyUrl;
 } // namespace Client
 } // namespace mediakit