Extract HTTP request functionality.

profiler/src/HttpRequest.cpp

@@ -0,0 +1,56 @@
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "../common/TracySocket.hpp"
+#include "../server/TracyVersion.hpp"
+#include "HttpRequest.hpp"
+
+static constexpr char CRLF[2] = { '\r', '\n' };
+
+void HttpRequest( const char* server, const char* resource, int port, std::function<void(int, char*)> cb )
+{
+    tracy::Socket sock;
+    if( !sock.ConnectBlocking( server, port ) ) return;
+    char request[4096];
+    const auto len = sprintf( request, "GET %s HTTP/1.1\r\nHost: %s\r\nUser-Agent: Tracy Profiler %i.%i.%i\r\nConnection: close\r\nCache-Control: no-cache, no-store, must-revalidate\r\n\r\n", resource, server, tracy::Version::Major, tracy::Version::Minor, tracy::Version::Patch );
+    sock.Send( request, len );
+    char response[4096];
+    const auto sz = sock.ReadUpTo( response, 4096, 15 );
+    if( sz < 13 ) return;
+    if( memcmp( response, "HTTP/1.1 200", 12 ) != 0 ) return;
+    auto hdr = response + 13;
+    int contentLength = 0;
+    for(;;)
+    {
+        while( memcmp( hdr, CRLF, 2 ) != 0 ) hdr++;
+        hdr += 2;
+        if( memcmp( hdr, "Content-Length: ", 16 ) == 0 )
+        {
+            hdr += 16;
+            contentLength = atoi( hdr );
+            break;
+        }
+    }
+    assert( contentLength != 0 );
+    for(;;)
+    {
+        while( memcmp( hdr, CRLF, 2 ) != 0 ) hdr++;
+        hdr += 2;
+        if( memcmp( hdr, CRLF, 2 ) == 0 )
+        {
+            hdr += 2;
+            break;
+        }
+        hdr += 2;
+    }
+
+    const auto hdrSize = hdr - response;
+    const auto partSize = sz - hdrSize;
+    char* data = new char[contentLength];
+    memcpy( data, hdr, partSize );
+    auto remaining = contentLength - partSize;
+    if( remaining > 0 ) sock.Read( data + partSize, remaining, 15 );
+
+    cb( contentLength, data );
+}