Chilkat Online Tools

BatchDetectSentiment Node.js Example

Amazon Comprehend

var os = require('os');
if (os.platform() == 'win32') {  
    if (os.arch() == 'ia32') {
        var chilkat = require('@chilkat/ck-node17-win-ia32');
    } else {
        var chilkat = require('@chilkat/ck-node17-win64'); 
    }
} else if (os.platform() == 'linux') {
    if (os.arch() == 'arm') {
        var chilkat = require('@chilkat/ck-node17-arm');
    } else if (os.arch() == 'x86') {
        var chilkat = require('@chilkat/ck-node17-linux32');
    } else {
        var chilkat = require('@chilkat/ck-node17-linux64');
    }
} else if (os.platform() == 'darwin') {
    var chilkat = require('@chilkat/ck-node17-macosx');
}

function chilkatExample() {

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

    var rest = new chilkat.Rest();
    var success;

    var authAws = new chilkat.AuthAws();
    authAws.AccessKey = "AWS_ACCESS_KEY";
    authAws.SecretKey = "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.Region = "us-west-2";
    authAws.ServiceName = "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("comprehend.us-west-2.amazonaws.com",443,true,true);
    if (success !== true) {
        console.log("ConnectFailReason: " + rest.ConnectFailReason);
        console.log(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

    var json = new chilkat.JsonObject();
    json.UpdateString("LanguageCode","string");
    json.UpdateString("TextList[0]","string");

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

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

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

    var sbRequestBody = new chilkat.StringBuilder();
    json.EmitSb(sbRequestBody);
    var sbResponseBody = new chilkat.StringBuilder();
    success = rest.FullRequestSb("POST","/",sbRequestBody,sbResponseBody);
    if (success !== true) {
        console.log(rest.LastErrorText);
        return;
    }

    var respStatusCode = rest.ResponseStatusCode;
    console.log("response status code = " + respStatusCode);
    if (respStatusCode !== 200) {
        console.log("Response Header:");
        console.log(rest.ResponseHeader);
        console.log("Response Body:");
        console.log(sbResponseBody.GetAsString());
        return;
    }

    var jResp = new chilkat.JsonObject();
    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

    var ErrorCode;
    var ErrorMessage;
    var Index;
    var Sentiment;
    var Mixed;
    var Negative;
    var Neutral;
    var Positive;

    var i = 0;
    var count_i = jResp.SizeOfArray("ErrorList");
    while (i < count_i) {
        jResp.I = i;
        ErrorCode = jResp.StringOf("ErrorList[i].ErrorCode");
        ErrorMessage = jResp.StringOf("ErrorList[i].ErrorMessage");
        Index = jResp.IntOf("ErrorList[i].Index");
        i = i+1;
    }

    i = 0;
    count_i = jResp.SizeOfArray("ResultList");
    while (i < count_i) {
        jResp.I = i;
        Index = jResp.IntOf("ResultList[i].Index");
        Sentiment = jResp.StringOf("ResultList[i].Sentiment");
        Mixed = jResp.IntOf("ResultList[i].SentimentScore.Mixed");
        Negative = jResp.IntOf("ResultList[i].SentimentScore.Negative");
        Neutral = jResp.IntOf("ResultList[i].SentimentScore.Neutral");
        Positive = jResp.IntOf("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
    //       }
    //     }
    //   ]
    // }

}

chilkatExample();