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C Web API Examples

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(C) Facebook Upload Photo from Local File

Uploads a new photo with a caption from a local file.

Chilkat C/C++ Library Downloads

MS Visual C/C++

Linux/CentOS C/C++

Alpine Linux C/C++

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armhf/aarch64 C/C++

C++ Builder

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MinGW C/C++

#include <C_CkHttp.h>
#include <C_CkHttpRequest.h>
#include <C_CkHttpResponse.h>

void ChilkatSample(void)
    {
    HCkHttp http;
    HCkHttpRequest req;
    BOOL success;
    HCkHttpResponse resp;
    const char *responseJson;

    // This example assumes Chilkat HTTP to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    http = CkHttp_Create();

    req = CkHttpRequest_Create();
    CkHttpRequest_putHttpVerb(req,"POST");
    CkHttpRequest_putContentType(req,"multipart/form-data");
    CkHttpRequest_putPath(req,"/v2.7/me/photos");

    // Use the previously obtained access token.
    // Note: The publish_actions scope is required to upload a photo.
    CkHttpRequest_AddHeader(req,"Authorization","Bearer FACEBOOK-ACCESS-TOKEN");

    // Send an "Expect: 100-continue" header in the request.
    // This causes the HTTP server to end a 100-continue response
    // immediately after receiving the HTTP header.  The client
    // (Chilkat) will receive this intermediate response, and if
    // it's not an error response, it knows that the HTTP server will
    // accept the data that is forthcoming.
    // The alternative is to get an error response after trying to upload
    // the entire contents of the files.
    CkHttpRequest_AddHeader(req,"Expect","100-continue");

    // Set a photo caption.
    CkHttpRequest_AddParam(req,"caption","Here are some penguins!");

    // Additional parameters can be added to the request by 
    // calling AddParam once per parameter.  
    // See https://developers.facebook.com/docs/graph-api/reference/user/photos
    // for more information about other optional parameters.

    // Indicate the local file to be uploaded.
    success = CkHttpRequest_AddFileForUpload(req,"source","qa_data/jpg/penguins2.jpg");
    if (success != TRUE) {
        printf("%s\n",CkHttpRequest_lastErrorText(req));
        CkHttp_Dispose(http);
        CkHttpRequest_Dispose(req);
        return;
    }

    // Upload the image file..
    resp = CkHttp_SynchronousRequest(http,"graph.facebook.com",443,TRUE,req);
    if (CkHttp_getLastMethodSuccess(http) != TRUE) {
        printf("%s\n",CkHttp_lastErrorText(http));
        CkHttp_Dispose(http);
        CkHttpRequest_Dispose(req);
        return;
    }

    // Examine the response body:
    responseJson = CkHttpResponse_bodyStr(resp);
    printf("%s\n",responseJson);

    // The response contains JSON, such as this:
    // {"id":"10210224963435862","post_id":"10224048320139890_10210224963435862"}

    CkHttpResponse_Dispose(resp);


    CkHttp_Dispose(http);
    CkHttpRequest_Dispose(req);

    }

 

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