整理优化代码

src/Common/Parser.cpp

@@ -0,0 +1,32 @@
+//
+// Created by xzl on 2019/6/28.
+//
+
+#include "Parser.h"
+
+namespace mediakit{
+
+string FindField(const char* buf, const char* start, const char *end ,int bufSize) {
+    if(bufSize <=0 ){
+        bufSize = strlen(buf);
+    }
+    const char *msg_start = buf, *msg_end = buf + bufSize;
+    int len = 0;
+    if (start != NULL) {
+        len = strlen(start);
+        msg_start = strstr(buf, start);
+    }
+    if (msg_start == NULL) {
+        return "";
+    }
+    msg_start += len;
+    if (end != NULL) {
+        msg_end = strstr(msg_start, end);
+        if (msg_end == NULL) {
+            return "";
+        }
+    }
+    return string(msg_start, msg_end);
+}
+
+}//namespace mediakit