Chilkat Online Tools

BatchDetectSentiment unicodeCpp Example

Amazon Comprehend

#include <CkRestW.h>
#include <CkAuthAwsW.h>
#include <CkJsonObjectW.h>
#include <CkStringBuilderW.h>

void ChilkatSample(void)
    {
    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    CkRestW rest;
    bool success;

    CkAuthAwsW authAws;
    authAws.put_AccessKey(L"AWS_ACCESS_KEY");
    authAws.put_SecretKey(L"AWS_SECRET_KEY");

    // Don't forget to change the region to your particular region. (Also make the same change in the call to Connect below.)
    authAws.put_Region(L"us-west-2");
    authAws.put_ServiceName(L"comprehend");
    // SetAuthAws causes Chilkat to automatically add the following headers: Authorization, X-Amz-Date
    rest.SetAuthAws(authAws);

    // URL: https://comprehend.us-west-2.amazonaws.com/
    // Use the same region as specified above.
    success = rest.Connect(L"comprehend.us-west-2.amazonaws.com",443,true,true);
    if (success != true) {
        wprintf(L"ConnectFailReason: %d\n",rest.get_ConnectFailReason());
        wprintf(L"%s\n",rest.lastErrorText());
        return;
    }

    // The following code creates the JSON request body.
    // The JSON created by this code is shown below.

    // Use this online tool to generate code from sample JSON:
    // Generate Code to Create JSON

    CkJsonObjectW json;
    json.UpdateString(L"LanguageCode",L"string");
    json.UpdateString(L"TextList[0]",L"string");

    // The JSON request body created by the above code:

    // {
    //   "LanguageCode": "string",
    //   "TextList": [
    //     "string"
    //   ]
    // }

    rest.AddHeader(L"Content-Type",L"application/x-amz-json-1.1");
    rest.AddHeader(L"X-Amz-Target",L"Comprehend_20171127.BatchDetectSentiment");

    CkStringBuilderW sbRequestBody;
    json.EmitSb(sbRequestBody);
    CkStringBuilderW sbResponseBody;
    success = rest.FullRequestSb(L"POST",L"/",sbRequestBody,sbResponseBody);
    if (success != true) {
        wprintf(L"%s\n",rest.lastErrorText());
        return;
    }

    int respStatusCode = rest.get_ResponseStatusCode();
    wprintf(L"response status code = %d\n",respStatusCode);
    if (respStatusCode != 200) {
        wprintf(L"Response Header:\n");
        wprintf(L"%s\n",rest.responseHeader());
        wprintf(L"Response Body:\n");
        wprintf(L"%s\n",sbResponseBody.getAsString());
        return;
    }

    CkJsonObjectW jResp;
    jResp.LoadSb(sbResponseBody);

    // The following code parses the JSON response.
    // A sample JSON response is shown below the sample code.

    // Use this online tool to generate parsing code from sample JSON:
    // Generate Parsing Code from JSON

    // Chilkat functions returning "const char *" return a pointer to temporary internal memory owned and managed by Chilkat.
    // See this example explaining how this memory should be used: const char * functions.

    const wchar_t *ErrorCode = 0;
    const wchar_t *ErrorMessage = 0;
    int Index;
    const wchar_t *Sentiment = 0;
    int Mixed;
    int Negative;
    int Neutral;
    int Positive;

    int i = 0;
    int count_i = jResp.SizeOfArray(L"ErrorList");
    while (i < count_i) {
        jResp.put_I(i);
        ErrorCode = jResp.stringOf(L"ErrorList[i].ErrorCode");
        ErrorMessage = jResp.stringOf(L"ErrorList[i].ErrorMessage");
        Index = jResp.IntOf(L"ErrorList[i].Index");
        i = i + 1;
    }

    i = 0;
    count_i = jResp.SizeOfArray(L"ResultList");
    while (i < count_i) {
        jResp.put_I(i);
        Index = jResp.IntOf(L"ResultList[i].Index");
        Sentiment = jResp.stringOf(L"ResultList[i].Sentiment");
        Mixed = jResp.IntOf(L"ResultList[i].SentimentScore.Mixed");
        Negative = jResp.IntOf(L"ResultList[i].SentimentScore.Negative");
        Neutral = jResp.IntOf(L"ResultList[i].SentimentScore.Neutral");
        Positive = jResp.IntOf(L"ResultList[i].SentimentScore.Positive");
        i = i + 1;
    }

    // A sample JSON response body parsed by the above code:

    // {
    //   "ErrorList": [
    //     {
    //       "ErrorCode": "string",
    //       "ErrorMessage": "string",
    //       "Index": number
    //     }
    //   ],
    //   "ResultList": [
    //     {
    //       "Index": number,
    //       "Sentiment": "string",
    //       "SentimentScore": {
    //         "Mixed": number,
    //         "Negative": number,
    //         "Neutral": number,
    //         "Positive": number
    //       }
    //     }
    //   ]
    // }
    }