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C Web API Examples

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(C) PayPal Send Invoice

Sends a PayPal invoice to a customer.

See also Send Invoice

Chilkat C/C++ Library Downloads

MS Visual C/C++

Linux/CentOS C/C++

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MAC OS X C/C++

armhf/aarch64 C/C++

C++ Builder

iOS C/C++

Android C/C++

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MinGW C/C++

#include <C_CkJsonObject.h>
#include <C_CkStringBuilder.h>
#include <C_CkRest.h>

void ChilkatSample(void)
    {
    HCkJsonObject jsonToken;
    HCkStringBuilder sbAuth;
    HCkRest rest;
    BOOL bAutoReconnect;
    BOOL success;
    HCkStringBuilder sbPath;
    int numReplacements;
    const char *responseBody;

    // Note: Requires Chilkat v9.5.0.64 or greater.

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

    // Load our previously obtained access token. (see PayPal OAuth2 Access Token)
    jsonToken = CkJsonObject_Create();
    CkJsonObject_LoadFile(jsonToken,"qa_data/tokens/paypal.json");

    // Build the Authorization request header field value.
    sbAuth = CkStringBuilder_Create();
    // token_type should be "Bearer"
    CkStringBuilder_Append(sbAuth,CkJsonObject_stringOf(jsonToken,"token_type"));
    CkStringBuilder_Append(sbAuth," ");
    CkStringBuilder_Append(sbAuth,CkJsonObject_stringOf(jsonToken,"access_token"));

    // Make the initial connection.
    // A single REST object, once connected, can be used for many PayPal REST API calls.
    // The auto-reconnect indicates that if the already-established HTTPS connection is closed,
    // then it will be automatically re-established as needed.
    rest = CkRest_Create();
    bAutoReconnect = TRUE;
    success = CkRest_Connect(rest,"api.sandbox.paypal.com",443,TRUE,bAutoReconnect);
    if (success != TRUE) {
        printf("%s\n",CkRest_lastErrorText(rest));
        CkJsonObject_Dispose(jsonToken);
        CkStringBuilder_Dispose(sbAuth);
        CkRest_Dispose(rest);
        return;
    }

    // ----------------------------------------------------------------------------------------------
    // The code above this comment could be placed inside a function/subroutine within the application
    // because the connection does not need to be made for every request.  Once the connection is made
    // the app may send many requests..
    // ----------------------------------------------------------------------------------------------

    // Build a path using a draft invoice ID.
    sbPath = CkStringBuilder_Create();
    CkStringBuilder_Append(sbPath,"/v1/invoicing/invoices/invoice_id/send");
    numReplacements = CkStringBuilder_Replace(sbPath,"invoice_id","INV2-QCHR-QHSD-M2VU-AVXC");

    CkRest_AddHeader(rest,"Authorization",CkStringBuilder_getAsString(sbAuth));
    CkRest_AddQueryParam(rest,"notify_merchant","true");

    responseBody = CkRest_fullRequestFormUrlEncoded(rest,"POST",CkStringBuilder_getAsString(sbPath));
    if (CkRest_getLastMethodSuccess(rest) != TRUE) {
        printf("%s\n",CkRest_lastErrorText(rest));
        CkJsonObject_Dispose(jsonToken);
        CkStringBuilder_Dispose(sbAuth);
        CkRest_Dispose(rest);
        CkStringBuilder_Dispose(sbPath);
        return;
    }

    printf("Response Status Code = %d\n",CkRest_getResponseStatusCode(rest));

    // Did we get a 202 accepted response?
    if (CkRest_getResponseStatusCode(rest) != 202) {
        printf("%s\n",responseBody);
        printf("Failed.\n");
        CkJsonObject_Dispose(jsonToken);
        CkStringBuilder_Dispose(sbAuth);
        CkRest_Dispose(rest);
        CkStringBuilder_Dispose(sbPath);
        return;
    }

    // If the 202 response is received, the response body would be empty...
    printf("Success.\n");


    CkJsonObject_Dispose(jsonToken);
    CkStringBuilder_Dispose(sbAuth);
    CkRest_Dispose(rest);
    CkStringBuilder_Dispose(sbPath);

    }

 

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