From 514592b89207e83d13b5a4e79bc247aa6f74c4b7 Mon Sep 17 00:00:00 2001
From: Daniel Stenberg <daniel@haxx.se>
Date: Mon, 12 May 2008 21:43:24 +0000
Subject: - Introducing curl_easy_send() and curl_easy_recv(). They can be used
to send and receive data over a connection previously setup with
curl_easy_perform() and its CURLOPT_CONNECT_ONLY option. The sendrecv.c
example was added to show how they can be used.
---
docs/examples/Makefile.inc | 3 +-
docs/examples/sendrecv.c | 117 +++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 119 insertions(+), 1 deletion(-)
create mode 100644 docs/examples/sendrecv.c
(limited to 'docs/examples')
diff --git a/docs/examples/Makefile.inc b/docs/examples/Makefile.inc
index 5d0c162a5..840c9bf6c 100644
--- a/docs/examples/Makefile.inc
+++ b/docs/examples/Makefile.inc
@@ -4,7 +4,8 @@ check_PROGRAMS = 10-at-a-time anyauthput cookie_interface \
getinfo getinmemory http-post httpput \
https multi-app multi-debugcallback multi-double \
multi-post multi-single persistant post-callback \
- postit2 sepheaders simple simplepost simplessl
+ postit2 sepheaders simple simplepost simplessl \
+ sendrecv
# These examples require external dependencies that may not be commonly
# available on POSIX systems, so don't bother attempting to compile them here.
diff --git a/docs/examples/sendrecv.c b/docs/examples/sendrecv.c
new file mode 100644
index 000000000..1a37d2862
--- /dev/null
+++ b/docs/examples/sendrecv.c
@@ -0,0 +1,117 @@
+/*****************************************************************************
+ * _ _ ____ _
+ * Project ___| | | | _ \| |
+ * / __| | | | |_) | |
+ * | (__| |_| | _ <| |___
+ * \___|\___/|_| \_\_____|
+ *
+ * An example of curl_easy_send() and curl_easy_recv() usage.
+ *
+ * $Id$
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <curl/curl.h>
+
+/* Auxiliary function that waits on the socket. */
+static int wait_on_socket(int sockfd, int for_recv, long timeout_ms)
+{
+ struct timeval tv;
+ long seconds, usecs;
+ fd_set infd, outfd, errfd;
+ int res;
+
+ tv.tv_sec = timeout_ms / 1000;
+ tv.tv_usec= (timeout_ms % 1000) * 1000;
+
+ FD_ZERO(&infd);
+ FD_ZERO(&outfd);
+ FD_ZERO(&errfd);
+
+ FD_SET(sockfd, &errfd); /* always check for error */
+
+ if(for_recv)
+ {
+ FD_SET(sockfd, &infd);
+ }
+ else
+ {
+ FD_SET(sockfd, &outfd);
+ }
+
+ /* select() returns the number of signalled sockets or -1 */
+ res = select(sockfd + 1, &infd, &outfd, &errfd, &tv);
+ return res;
+}
+
+int main(void)
+{
+ CURL *curl;
+ CURLcode res;
+ /* Minimalistic http request */
+ const char *request = "GET / HTTP/1.0\r\nHost: curl.haxx.se\r\n\r\n";
+ int sockfd; /* socket */
+ size_t iolen;
+
+ curl = curl_easy_init();
+ if(curl) {
+ curl_easy_setopt(curl, CURLOPT_URL, "curl.haxx.se");
+ /* Do not do the transfer - only connect to host */
+ curl_easy_setopt(curl, CURLOPT_CONNECT_ONLY, 1L);
+ res = curl_easy_perform(curl);
+
+ if(CURLE_OK != res)
+ {
+ printf("Error: %s\n", strerror(res));
+ return 1;
+ }
+
+ /* Extract the socket from the curl handle - we'll need it
+ * for waiting */
+ res = curl_easy_getinfo(curl, CURLINFO_LASTSOCKET, &sockfd);
+
+ if(CURLE_OK != res)
+ {
+ printf("Error: %s\n", strerror(res));
+ return 1;
+ }
+
+ /* wait for the socket to become ready for sending */
+ if(!wait_on_socket(sockfd, 0, 60000L))
+ {
+ printf("Error: timeout.\n");
+ return 1;
+ }
+
+ puts("Sending request.");
+ /* Send the request. Real applications should check the iolen
+ * to see if all the request has been sent */
+ res = curl_easy_send(curl, request, strlen(request), &iolen);
+
+ if(CURLE_OK != res)
+ {
+ printf("Error: %s\n", strerror(res));
+ return 1;
+ }
+ puts("Reading response.");
+
+ /* read the response */
+ for(;;)
+ {
+ char buf[1024];
+
+ wait_on_socket(sockfd, 1, 60000L);
+ res = curl_easy_recv(curl, buf, 1024, &iolen);
+
+ if(CURLE_OK != res)
+ break;
+
+ printf("Received %u bytes.\n", iolen);
+ }
+
+ /* always cleanup */
+ curl_easy_cleanup(curl);
+ }
+ return 0;
+}
--
cgit v1.2.3