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C Web API Examples

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(C) VoiceBase -- Upload a media file for transcription and analysis

This example demonstrates how to upload a media file for transcription and analysis. It duplicates the following curl command:

curl https://apis.voicebase.com/v2-beta/media \
  --form media=@msg_123_abc.wav \
  --header "Authorization: Bearer ${TOKEN}"

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

void ChilkatSample(void)
    {
    const char *accessToken;
    HCkHttp http;
    HCkHttpRequest req;
    HCkStringBuilder sbAuth;
    BOOL success;
    HCkHttpResponse resp;
    HCkJsonObject json;

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

    // Insert your Bearer token here:
    accessToken = "VOICEBASE_TOKEN";

    http = CkHttp_Create();

    req = CkHttpRequest_Create();
    CkHttpRequest_putHttpVerb(req,"POST");
    CkHttpRequest_putPath(req,"/v2-beta/media");
    CkHttpRequest_putContentType(req,"multipart/form-data");

    // Add the access (bearer) token to the request, which is a header
    // having the following format:
    // Authorization: Bearer <userAccessToken>
    sbAuth = CkStringBuilder_Create();
    CkStringBuilder_Append(sbAuth,"Bearer ");
    CkStringBuilder_Append(sbAuth,accessToken);
    CkHttpRequest_AddHeader(req,"Authorization",CkStringBuilder_getAsString(sbAuth));

    success = CkHttpRequest_AddFileForUpload2(req,"media","qa_data/wav/msg_123_abc.wav","audio/x-wav");
    if (success != TRUE) {
        printf("%s\n",CkHttpRequest_lastErrorText(req));
        CkHttp_Dispose(http);
        CkHttpRequest_Dispose(req);
        CkStringBuilder_Dispose(sbAuth);
        return;
    }

    resp = CkHttp_SynchronousRequest(http,"apis.voicebase.com",443,TRUE,req);
    if (CkHttp_getLastMethodSuccess(http) != TRUE) {
        printf("%s\n",CkHttp_lastErrorText(http));
        CkHttp_Dispose(http);
        CkHttpRequest_Dispose(req);
        CkStringBuilder_Dispose(sbAuth);
        return;
    }

    // Examine the response status code and body.
    printf("Response status code = %d\n",CkHttpResponse_getStatusCode(resp));

    // The response should be JSON, even if an error.
    json = CkJsonObject_Create();
    CkJsonObject_Load(json,CkHttpResponse_bodyStr(resp));
    CkJsonObject_putEmitCompact(json,FALSE);

    printf("%s\n",CkJsonObject_emit(json));

    // A successful response will have a status code = 200
    if (CkHttpResponse_getStatusCode(resp) != 200) {
        printf("Failed.\n");
    }
    else {
        printf("mediaId: %s\n",CkJsonObject_stringOf(json,"mediaId"));
        printf("href: %s\n",CkJsonObject_stringOf(json,"_links.self.href"));
        printf("status: %s\n",CkJsonObject_stringOf(json,"status"));
        printf("Success.\n");
    }

    CkHttpResponse_Dispose(resp);

    // Here is an example of a successful response:

    // 	{ 
    // 	  "_links": { 
    // 	    "self": { 
    // 	      "href": "/v2-beta/media/856a1e85-c847-4c3c-b7a4-6cf15cd51db4"
    // 	    }
    // 	  },
    // 	  "mediaId": "856a1e85-c847-4c3c-b7a4-6cf15cd51db4",
    // 	  "status": "accepted",
    // 	  "metadata": {}
    // 	


    CkHttp_Dispose(http);
    CkHttpRequest_Dispose(req);
    CkStringBuilder_Dispose(sbAuth);
    CkJsonObject_Dispose(json);

    }

 

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