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On 09/10/2010 11:18 AM, Weibin Yao wrote:
> I find the oauthexample.c is a block IO example, is there a no-block
> IO example?
Short answer: No, but there is libcurl example code for this.
Basically libOAuth only handles the OAuth part (parameter encoding,
signing), however it [optionally] includes a few convenient wrappers
around libcurl.
The HTTP/curl integration in libOAuth is very simple, it also does not
do any error handing and is basically just curl-example code.
It's very easy to to use [lib]curl directly.
One option for non-blocking requests with libOAuth is to simply start a
thread for the HTTP request. 'oauth_post_data_with_callback()' also
allows to update a progress-bar as the request is executed...
C++ code using pthreads would look like this:
- --8<-------------------
extern "C" {
#include <oauth.h>
#include <pthread.h>
}
void *http_get_thread (void *arg) {
MyClass *m = static_cast<MyClass *>(arg);
/* optional - if you'd like to be able to abort
the request with pthread_cancel() */
pthread_setcancelstate(PTHREAD_CANCEL_ENABLE,NULL);
pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, NULL);
char *res = oauth_http_get2(m->signed_req_url, NULL, NULL);
/* optional : don't allow to abort once the request
is finished and we're processing the returned data */
pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, NULL);
m->http_download_done(res);
pthread_exit(0);
return 0;
}
void
MyClass::http_download_done (char *data){
if (!data) { /* HTTP status != 200 */ return; }
/* do something - still in background thread context. */
free(data);
}
void
MyClass::launch_http_request() {
pthread_create(&thread_id_tt, NULL, http_get_thread, this);
}
- --8<-------------------
HTH,
robin
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