C

HTTP multipart/form-data Upload

See more HTTP Examples

Demonstrates how to upload files to an HTTP server using a multipart/form-data POST. C

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

void ChilkatSample(void)
    {
    BOOL success;
    HCkHttp http;
    HCkHttpRequest req;
    HCkHttpResponse resp;

    success = FALSE;

    // This example requires the Chilkat API 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,"rcvFormDataUpload.aspx");

    // 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");

    // Call AddFileForUpload2 for each file to be uploaded in the HTTP multipart/form-data POST
    // To allow Chilkat to determine the content-type automatically based on file-extension,
    // call AddFileForUpload instead.

    // The 1st arg is the filename passed in the HTTP request.
    // The 2nd arg is the path in the local filesytem.
    // The file is not loaded into memory.  It is streamed directly from the file
    // when the HTTP POST is sent.
    success = CkHttpRequest_AddFileForUpload2(req,"starfish.jpg","c:/qa_data/starfish.jpg","image/jpg");
    if (success == FALSE) {
        printf("%s\n",CkHttpRequest_lastErrorText(req));
        CkHttp_Dispose(http);
        CkHttpRequest_Dispose(req);
        return;
    }

    success = CkHttpRequest_AddFileForUpload(req,"something.pdf","c:/qa_data/something.pdf");
    if (success == FALSE) {
        printf("%s\n",CkHttpRequest_lastErrorText(req));
        CkHttp_Dispose(http);
        CkHttpRequest_Dispose(req);
        return;
    }

    // Its also possible to add a file from a string:
    success = CkHttpRequest_AddStringForUpload(req,"test.xml","test.xml","<abc>This is the test.xml content</abc>","utf-8");
    // We'll assume success since no files are involved..

    // This sends the HTTP request (with 3 files being uploaded) to
    // http://www.mywebserver123abc.com/rcvFormDataUpload.aspx
    resp = CkHttpResponse_Create();
    success = CkHttp_HttpSReq(http,"www.mywebserver123abc.com",80,FALSE,req,resp);
    if (success == FALSE) {
        printf("%s\n",CkHttp_lastErrorText(http));
        CkHttp_Dispose(http);
        CkHttpRequest_Dispose(req);
        CkHttpResponse_Dispose(resp);
        return;
    }

    printf("HTTP response status: %d\n",CkHttpResponse_getStatusCode(resp));
    // See the online reference documentation for 
    // other information that can be obtained from the response object.

    // To send using SSL/TLS, do this instead.
    // This sends to https://www.mywebserver123abc.com/rcvFormDataUpload.aspx
    success = CkHttp_HttpSReq(http,"www.mywebserver123abc.com",443,TRUE,req,resp);
    if (success == FALSE) {
        printf("%s\n",CkHttp_lastErrorText(http));
        CkHttp_Dispose(http);
        CkHttpRequest_Dispose(req);
        CkHttpResponse_Dispose(resp);
        return;
    }

    printf("HTTP response status: %d\n",CkHttpResponse_getStatusCode(resp));
    // See the online reference documentation for 
    // other information that can be obtained from the response object.


    CkHttp_Dispose(http);
    CkHttpRequest_Dispose(req);
    CkHttpResponse_Dispose(resp);

    }