Implemented handling of HTTP redirect codes.

svn path=/trunk/boinc/; revision=265

TODO

@@ -160,6 +160,8 @@ LOW-PRIORITY
 --------------------------
 DONE (may need test)  Please document these!
 
+- Test HTTP redirect mechanism for all types of operations (POST, GET, HEAD, etc)
+
 - mechanism for returning app stderr output to server? store in blob?
 
 - add size to FILE_INFO

checkin_notes

@@ -1370,3 +1370,15 @@ David A.    July 30, 2002
         index.html
     lib/
         parse.C
+
+Eric Heien  August 2, 2002
+    - Implemented HTTP 301 and 302 redirect commands.
+    - These still need to be fully tested.
+
+    TODO
+    client/
+        http.C
+        http.h
+        net_xfer.C
+        net_xfer.h
+

client/http.C

@@ -237,6 +237,18 @@ int read_http_reply_header(int socket, HTTP_REPLY_HEADER& header) {
             if (p) {
                 header.content_length = atoi(p+strlen("Content-Length: "));
             }
+            p = strstr(buf, "Location: ");
+            if (p) {
+                // TODO: Is there a better way to do this?
+                n = 0;
+                p += strlen( "Location: " );
+
+                while (p[n] != '\n' && p[n] != '\r') {
+                    header.redirect_location[n] = p[n];
+                    n++;
+                }
+                p[n] = '\0';
+            }
             return 0;
         }
     }
@@ -427,7 +439,7 @@ HTTP_OP_SET::HTTP_OP_SET(NET_XFER_SET* p) {
     net_xfers = p;
 }
 
-// Inserts an hTTP_OP into the set
+// Inserts an HTTP_OP into the set
 //
 int HTTP_OP_SET::insert(HTTP_OP* ho) {
     int retval;
@@ -534,6 +546,30 @@ bool HTTP_OP_SET::poll() {
                 action = true;
                 if (log_flags.http_debug) printf("got reply header\n");
                 read_http_reply_header(htp->socket, htp->hrh);
+                // TODO: handle all kinds of redirects here
+                if (htp->hrh.status == 301 || htp->hrh.status == 302) {
+                    fprintf( stderr, "Redirect to %s\n", htp->hrh.redirect_location );
+                    // Close the old socket
+                    htp->close_socket();
+                    switch (htp->http_op_type) {
+                        case HTTP_OP_HEAD:
+                            htp->init_head( htp->hrh.redirect_location );
+                            break;
+                        case HTTP_OP_GET:
+                            htp->init_get( htp->hrh.redirect_location, htp->outfile );
+                            break;
+                        case HTTP_OP_POST:
+                            htp->init_post( htp->hrh.redirect_location, htp->infile, htp->outfile );
+                            break;
+                        case HTTP_OP_POST2:
+                            // TODO: Change offset to correct value
+                            htp->init_post2( htp->hrh.redirect_location, htp->req1, htp->infile,0 );
+                            break;
+                    }
+                    // Open connection to the redirected server
+                    htp->open_server();
+                    break;
+                }
                 if (htp->hrh.status/100 != 2) {
                     htp->http_op_state = HTTP_STATE_DONE;
                     htp->http_op_retval = htp->hrh.status;

client/http.h

@@ -29,6 +29,7 @@
 struct HTTP_REPLY_HEADER {
     int status;
     int content_length;
+    char redirect_location[256];
 };
 
 #define HTTP_OP_NONE    0

client/net_xfer.C

@@ -123,6 +123,13 @@ int NET_XFER::open_server() {
     return 0;
 }
 
+void NET_XFER::close_socket( void ) {
+#ifdef _WIN32
+    if (socket) closesocket(socket);
+#else
+    if (socket) close(socket);
+#endif
+}
 
 void NET_XFER::init(char* host, int p, int b) {
     // net_xfer_state = ?
@@ -154,11 +161,8 @@ int NET_XFER_SET::insert(NET_XFER* nxp) {
 int NET_XFER_SET::remove(NET_XFER* nxp) {
     vector<NET_XFER*>::iterator iter;
 
-#ifdef _WIN32
-    if (nxp->socket) closesocket(nxp->socket);
-#else
-    if (nxp->socket) close(nxp->socket);
-#endif
+    // Close the socket
+    nxp->close_socket();
 
     iter = net_xfers.begin();
     while (iter != net_xfers.end()) {

client/net_xfer.h

@@ -51,6 +51,7 @@ public:
 
     void init(char* host, int port, int blocksize);
     int open_server();
+    void close_socket();
     int do_xfer(int&);
     void got_error();
 };