(C) DocuSign Download Envelope Document (PDF)

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Retrieves the specified document from the envelope. The response body of this method is the PDF file as a byte stream. You can get the file name and document ID from the response's Content-Disposition header.

For more information, see https://developers.docusign.com/docs/esign-rest-api/reference/envelopes/envelopedocuments/get/

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#include <C_CkHttp.h>
#include <C_CkJsonObject.h>
#include <C_CkBinData.h>
#include <C_CkMime.h>
#include <C_CkStringBuilder.h>

void ChilkatSample(void)
    {
    HCkHttp http;
    BOOL success;
    HCkJsonObject jsonToken;
    const char *url;
    HCkBinData bd;
    int respStatusCode;
    HCkMime mime;
    const char *filename;
    HCkStringBuilder sbPath;

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

    http = CkHttp_Create();

    // Implements the following HTTP request:
    // GET /restapi/v2.1/accounts/{accountId}/envelopes/{envelopeId}/documents/1

    // Adds the "Authorization: Bearer eyJ0eXAi.....UE8Kl_V8KroQ" header.
    jsonToken = CkJsonObject_Create();
    // Load a previously obtained OAuth2 access token.
    success = CkJsonObject_LoadFile(jsonToken,"qa_data/tokens/docusign.json");
    if (success == FALSE) {
        printf("%s\n",CkJsonObject_lastErrorText(jsonToken));
        CkHttp_Dispose(http);
        CkJsonObject_Dispose(jsonToken);
        return;
    }

    CkHttp_putAuthToken(http,CkJsonObject_stringOf(jsonToken,"access_token"));

    // Use your account ID and a valid envelopeId here:
    CkHttp_SetUrlVar(http,"accountId","7f3f65ed-5e87-418d-94c1-92499ddc8252");
    CkHttp_SetUrlVar(http,"envelopeId","90d7e40a-b4bd-4ccd-bf38-c80e37954a13");

    url = "https://demo.docusign.net/restapi/v2.1/accounts/{$accountId}/envelopes/{$envelopeId}/documents/1";
    bd = CkBinData_Create();

    success = CkHttp_DownloadBd(http,url,bd);
    if (success == FALSE) {
        printf("%s\n",CkHttp_lastErrorText(http));
        CkHttp_Dispose(http);
        CkJsonObject_Dispose(jsonToken);
        CkBinData_Dispose(bd);
        return;
    }

    respStatusCode = CkHttp_getLastStatus(http);
    printf("Response Status Code = %d\n",respStatusCode);
    if (respStatusCode != 200) {
        printf("Response Header:\n");
        printf("%s\n",CkHttp_lastResponseHeader(http));
        // The response body contains an error message.
        printf("%s\n",CkBinData_getString(bd,"utf-8"));
        printf("Failed.\n");
        CkHttp_Dispose(http);
        CkJsonObject_Dispose(jsonToken);
        CkBinData_Dispose(bd);
        return;
    }

    // The response indicated success.
    // Get the filename from the Content-Disposition header and save to a file.
    mime = CkMime_Create();
    CkMime_LoadMime(mime,CkHttp_lastResponseHeader(http));

    filename = CkMime_getHeaderFieldAttribute(mime,"Content-Disposition","filename");
    printf("filename = %s\n",filename);

    sbPath = CkStringBuilder_Create();
    CkStringBuilder_Append(sbPath,"C:/aaworkarea/");
    CkStringBuilder_Append(sbPath,filename);
    success = CkBinData_WriteFile(bd,CkStringBuilder_getAsString(sbPath));
    if (success == FALSE) {
        printf("Failed to save to output file.\n");
    }
    else {
        printf("Wrote %s\n",CkStringBuilder_getAsString(sbPath));
    }



    CkHttp_Dispose(http);
    CkJsonObject_Dispose(jsonToken);
    CkBinData_Dispose(bd);
    CkMime_Dispose(mime);
    CkStringBuilder_Dispose(sbPath);

    }