100 continue

7 files changed, 53 insertions, 33 deletions

diff --git a/ChangeLog b/ChangeLog
index 5be3654e..af5c76fb 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,7 +1,8 @@
 Fri Aug 10 17:31:23 MDT 2007
 	 Fixed problems with handling of responses created from
 	 callbacks.  Allowing accept policy callback to be NULL
-	 (to accept from all).  Added minimal fileserver example. -CG
+	 (to accept from all).  Added minimal fileserver example.
+	 Only send 100 continue header when specifically requested. - CG
 
 Wed Aug  8 01:46:06 MDT 2007
 	 Added pool allocation and connection limitations (total
diff --git a/src/daemon/connection.c b/src/daemon/connection.c
index 6da77002..b5d0b3dd 100644
--- a/src/daemon/connection.c
+++ b/src/daemon/connection.c
@@ -31,11 +31,6 @@
 #include "response.h"
 
 /**
- * Size by which MHD usually tries to increment read/write buffers.
- */
-#define MHD_BUF_INC_SIZE 2048
-
-/**
  * Message to transmit when http 1.1 request is received
  */
 #define HTTP_100_CONTINUE "HTTP/1.1 100 Continue\r\n\r\n"
@@ -141,6 +136,25 @@ MHD_queue_response(struct MHD_Connection * connection,
   return MHD_YES;
 }
 
+/**
+ * Do we (still) need to send a 100 continue
+ * message for this connection?
+ */
+static int 
+MHD_need_100_continue(struct MHD_Connection * connection) {
+  const char * expect;
+
+  return ( (connection->version != NULL) &&
+	   (0 == strcasecmp(connection->version,
+			    MHD_HTTP_VERSION_1_1)) &&
+	   (connection->headersReceived == 1) &&
+	   (NULL != (expect = MHD_lookup_connection_value(connection,
+							  MHD_HEADER_KIND,
+							  MHD_HTTP_HEADER_EXPECT))) &&
+	   (0 == strcasecmp(expect,
+			    "100-continue")) &&
+	   (connection->continuePos < strlen(HTTP_100_CONTINUE)) );
+}
 
 /**
  * Obtain the select sets for this connection
@@ -186,10 +200,7 @@ MHD_connection_get_fdset(struct MHD_Connection * connection,
     }
   } 
   if ( (connection->response != NULL) ||
-       ( (connection->version != NULL) &&
-	 (0 == strcasecmp(connection->version,
-			  MHD_HTTP_VERSION_1_1)) &&
-	 (connection->continuePos < strlen(HTTP_100_CONTINUE)) ) ) {
+       MHD_need_100_continue(connection) ) {
     FD_SET(fd, write_fd_set);
     if (fd > *max_fd) 
       *max_fd = fd;
@@ -998,10 +1009,7 @@ MHD_connection_handle_write(struct MHD_Connection * connection) {
   struct MHD_Response * response;
   int ret;
 
-  if ( (connection->version != NULL) &&
-       (0 == strcasecmp(connection->version,
-			MHD_HTTP_VERSION_1_1)) &&
-       (connection->continuePos < strlen(HTTP_100_CONTINUE)) ) {
+  if (MHD_need_100_continue(connection)) {
     ret = SEND(connection->socket_fd,
 	       &HTTP_100_CONTINUE[connection->continuePos],
 	       strlen(HTTP_100_CONTINUE) - connection->continuePos,
@@ -1067,24 +1075,18 @@ MHD_connection_handle_write(struct MHD_Connection * connection) {
   if (response->crc != NULL)
     pthread_mutex_lock(&response->mutex);
 
-  /* prepare send buffer */
-  if ( (response->data == NULL) ||
-       (response->data_start > connection->messagePos) ||
-       (response->data_start + response->data_size <= connection->messagePos) ) {
-    if (response->data_size == 0) {
-      if (response->data != NULL)
-	free(response->data);
-      response->data = malloc(MHD_BUF_INC_SIZE);
-      response->data_size = MHD_BUF_INC_SIZE;
-    }
+  /* prepare send buffer */  
+  if ( (response->crc != NULL) &&
+       ( (response->data_start > connection->messagePos) ||
+	 (response->data_start + response->data_size <= connection->messagePos) ) ) {
     ret = response->crc(response->crc_cls,
 			connection->messagePos,
 			response->data,
-			MIN(response->data_size,
+			MIN(response->data_buffer_size,
 			    response->total_size - connection->messagePos));
     if (ret == -1) {
       /* end of message, signal other side by closing! */
-      response->data_size = connection->messagePos;
+      response->total_size = connection->messagePos;
       CLOSE(connection->socket_fd);
       connection->socket_fd = -1;
       if (response->crc != NULL)
diff --git a/src/daemon/daemontest_get.c b/src/daemon/daemontest_get.c
index 89f50461..08de296d 100644
--- a/src/daemon/daemontest_get.c
+++ b/src/daemon/daemontest_get.c
@@ -165,7 +165,7 @@ static int testMultithreadedGet() {
   cbc.pos = 0;
   d = MHD_start_daemon(MHD_USE_THREAD_PER_CONNECTION | MHD_USE_DEBUG,
 		       1081,
-		       &apc_all,
+		       NULL,
 		       NULL,
 		       &ahc_echo,
 		       "GET",
@@ -248,7 +248,7 @@ static int testExternalGet() {
   cbc.pos = 0;
   d = MHD_start_daemon(MHD_USE_DEBUG,
 		       1082,
-		       &apc_all,
+		       NULL,
 		       NULL,
 		       &ahc_echo,
 		       "GET",
diff --git a/src/daemon/daemontest_post.c b/src/daemon/daemontest_post.c
index 5db2d6f8..2c020563 100644
--- a/src/daemon/daemontest_post.c
+++ b/src/daemon/daemontest_post.c
@@ -197,7 +197,7 @@ static int testMultithreadedPost() {
   cbc.pos = 0;
   d = MHD_start_daemon(MHD_USE_THREAD_PER_CONNECTION |MHD_USE_DEBUG,
 		       1081,
-		       &apc_all,
+		       NULL,
 		       NULL,
 		       &ahc_echo,
 		       NULL,
@@ -290,7 +290,7 @@ static int testExternalPost() {
   cbc.pos = 0;
   d = MHD_start_daemon(MHD_USE_DEBUG,
 		       1082,
-		       &apc_all,
+		       NULL,
 		       NULL,
 		       &ahc_echo,
 		       NULL,
diff --git a/src/daemon/daemontest_put.c b/src/daemon/daemontest_put.c
index 7a6fe98a..e2f03bdf 100644
--- a/src/daemon/daemontest_put.c
+++ b/src/daemon/daemontest_put.c
@@ -212,8 +212,7 @@ static int testMultithreadedPut() {
   cbc.pos = 0;
   d = MHD_start_daemon(MHD_USE_THREAD_PER_CONNECTION | MHD_USE_DEBUG,
 		       1081,
-		       &apc_all,
-		       NULL,
+		       NULL,		       NULL,
 		       &ahc_echo,
 		       &done_flag,
 		       MHD_OPTION_END);
@@ -310,7 +309,7 @@ static int testExternalPut() {
   cbc.pos = 0;
   d = MHD_start_daemon(MHD_USE_DEBUG,
 		       1082,
-		       &apc_all,
+		       NULL,
 		       NULL,
 		       &ahc_echo,
 		       &done_flag,
diff --git a/src/daemon/internal.h b/src/daemon/internal.h
index 25d231ee..8aa08243 100644
--- a/src/daemon/internal.h
+++ b/src/daemon/internal.h
@@ -53,6 +53,10 @@
 #define MAX(a,b) ((a)<(b)) ? (b) : (a)
 #define MIN(a,b) ((a)<(b)) ? (a) : (b)
 
+/**
+ * Size by which MHD usually tries to increment read/write buffers.
+ */
+#define MHD_BUF_INC_SIZE 2048
 
 /**
  * fprintf-like helper function for logging debug
@@ -147,6 +151,11 @@ struct MHD_Response {
   size_t data_size;
 
   /**
+   * Size of the data buffer.
+   */
+  size_t data_buffer_size;
+
+  /**
    * At what offset in the stream is the
    * beginning of data located?
    */
diff --git a/src/daemon/response.c b/src/daemon/response.c
index b816a8a5..0326a15b 100644
--- a/src/daemon/response.c
+++ b/src/daemon/response.c
@@ -168,7 +168,14 @@ MHD_create_response_from_callback(size_t size,
   memset(retVal,
 	 0,
 	 sizeof(struct MHD_Response));
+  retVal->data = malloc(MHD_BUF_INC_SIZE);
+  if (retVal->data == NULL) {
+    free(retVal);
+    return NULL;
+  }
+  retVal->data_buffer_size = MHD_BUF_INC_SIZE;
   if (pthread_mutex_init(&retVal->mutex, NULL) != 0) {
+    free(retVal->data);
     free(retVal);
     return NULL;
   }
@@ -258,6 +265,8 @@ MHD_destroy_response(struct MHD_Response * response) {
     free(pos->value);
     free(pos);
   }
+  if (response->crc != NULL) 
+    free(response->data);
   free(response);
 }