Guide on incorporating curl in Java and extracting JSON feedback

Question

Guide on incorporating curl in Java and extracting JSON feedback

Is it possible to use a curl command that provides a JSON response in Java and parse the JSON response using Java?

Here is an example of Java code attempting to achieve this:

public static void main(String[] args) throws Throwable {

    try {
        InputStream stream = Runtime.getRuntime().exec("curl --globoff --insecure --silent -u username:password -X GET -H 'Content-Type: application/json' \"http://ficcjira.xyz.com/rest/api/2/search?jql=project=ABC&fields=Timetracking\"").getInputStream();

        BufferedReader input = new BufferedReader(new InputStreamReader(stream), 1);

        input.readLine();
        input.read();
        input.read();

        DataReader reader = new JsonReader(input)
                .addField("TimeSpent", "//array/object/timespent")
                .addRecordBreak("//array/object");

        /*reader = new TransformingReader(reader)
                .add(new BasicFieldTransformer("TimeSpent").stringToDouble());*/

        DataWriter writer = new StreamWriter(System.out);

        JobTemplate.DEFAULT.transfer(reader, writer);

    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
}

However, the following error is encountered:

Cannot run program "curl": CreateProcess error=2, The system cannot find the file specified

java json parsing curl

Answer 1

Answer №1

        Runtime rt = Runtime.getRuntime();
        Process p1;
        Process p2;
        try {
            String postSubmissionJSon = "{"data":"value"}";

            String[] stringPost = {"curl", "-X", "POST", "https://your-url.com/api/posts",
                "--cert", "test.crt.pem",
                "--key", "test.key.pem",
                "-H", "accept: application/json",
                "-H", "content-type: application/json",
                "-d", postSubmissionJSon};

            ProcessBuilder ps = new ProcessBuilder(stringPost);
            //ps.redirectErrorStream(true);
            Process pr = ps.start();
            pr.waitFor();

            BufferedReader reader2 = new BufferedReader(new InputStreamReader(pr.getInputStream()));

            String line2 = "";
            while ((line2 = reader2.readLine()) != null) {
                output.append(line2 + "\n");
            }

            System.out.println("\n\n\noutput====" + output + "===\n\n\n");

            String sbToString = output.toString();

            JSONObject jSONObject = new JSONObject(sbToString);

            System.out.println(jSONObject.toString());

            p1 = Runtime.getRuntime().exec("pwd");
            p1.waitFor();
            BufferedReader reader1a
                    = new BufferedReader(new InputStreamReader(p1.getInputStream()));

            String line1a = "";
            while ((line1a = reader1a.readLine()) != null) {
                output.append(line1a + "\n");
                System.out.println("output====" + output + "===");
            }
        } catch (Exception e) {
            System.out.println("===============ERROR===============\n" + e.getMessage() + "\n\n\n");
        }

/*NOTE : Your Key (test.key.pem) and Cert (test.crt.pem) should be located on your proper directory. For glassfish it is on "~/glassfish4/glassfish/domains/domain1/config" or your can specify exact location by changing "--cert", "test.crt.pem" --> "/home/user/files/test.crt.pem". Same with the key. */

Answer 2

        Runtime rt = Runtime.getRuntime();
        Process p1;
        Process p2;
        try {
            String postSubmissionJSon = "{"data":"value"}";

            String[] stringPost = {"curl", "-X", "POST", "https://your-url.com/api/posts",
                "--cert", "test.crt.pem",
                "--key", "test.key.pem",
                "-H", "accept: application/json",
                "-H", "content-type: application/json",
                "-d", postSubmissionJSon};

            ProcessBuilder ps = new ProcessBuilder(stringPost);
            //ps.redirectErrorStream(true);
            Process pr = ps.start();
            pr.waitFor();

            BufferedReader reader2 = new BufferedReader(new InputStreamReader(pr.getInputStream()));

            String line2 = "";
            while ((line2 = reader2.readLine()) != null) {
                output.append(line2 + "\n");
            }

            System.out.println("\n\n\noutput====" + output + "===\n\n\n");

            String sbToString = output.toString();

            JSONObject jSONObject = new JSONObject(sbToString);

            System.out.println(jSONObject.toString());

            p1 = Runtime.getRuntime().exec("pwd");
            p1.waitFor();
            BufferedReader reader1a
                    = new BufferedReader(new InputStreamReader(p1.getInputStream()));

            String line1a = "";
            while ((line1a = reader1a.readLine()) != null) {
                output.append(line1a + "\n");
                System.out.println("output====" + output + "===");
            }
        } catch (Exception e) {
            System.out.println("===============ERROR===============\n" + e.getMessage() + "\n\n\n");
        }

/*NOTE : Your Key (test.key.pem) and Cert (test.crt.pem) should be located on your proper directory. For glassfish it is on "~/glassfish4/glassfish/domains/domain1/config" or your can specify exact location by changing "--cert", "test.crt.pem" --> "/home/user/files/test.crt.pem". Same with the key. */

Answer 3

Answer №2

If you're looking to access the Jira Rest API, there are several options available to you. It's important to choose the method that best fits your needs and technical capabilities.

One option is to use the Rest Java Client for Java. You can find more information about this client here.

If you prefer using Jersey, it allows you to call the REST APIs and read the responses effectively. Alternatively, if you're working with Spring, the RestTemplate is a convenient tool. You can check out some sample code here.

There are other options available such as Restlet and Apache commons. It's essential to explore and determine which one suits your project requirements best.

Using the curl option is recommended only when calling from a bash script. If you decide to go this route, consider utilizing jq for parsing the response data. More information on jq can be found here.

Answer 4

If you're looking to access the Jira Rest API, there are several options available to you. It's important to choose the method that best fits your needs and technical capabilities.

One option is to use the Rest Java Client for Java. You can find more information about this client here.

If you prefer using Jersey, it allows you to call the REST APIs and read the responses effectively. Alternatively, if you're working with Spring, the RestTemplate is a convenient tool. You can check out some sample code here.

There are other options available such as Restlet and Apache commons. It's essential to explore and determine which one suits your project requirements best.

Using the curl option is recommended only when calling from a bash script. If you decide to go this route, consider utilizing jq for parsing the response data. More information on jq can be found here.

Answer 5

Answer №3

My response will address the error that was brought to your attention. To resolve this issue, it is essential to have cUrl installed and ensure that it has been added to your PATH variable.

You can verify this by attempting to execute the curl command from your Windows command prompt. If you do not receive a valid response, it indicates that cUrl may not be installed or included in your PATH variable.

To install cUrl, you can visit , download the necessary files, extract them, add cUrl to your PATH variable, and then try running the cUrl command once more.

Answer 6

My response will address the error that was brought to your attention. To resolve this issue, it is essential to have cUrl installed and ensure that it has been added to your PATH variable.

You can verify this by attempting to execute the curl command from your Windows command prompt. If you do not receive a valid response, it indicates that cUrl may not be installed or included in your PATH variable.

To install cUrl, you can visit , download the necessary files, extract them, add cUrl to your PATH variable, and then try running the cUrl command once more.

Answer 7

Answer №4

To retrieve and parse JSON data from a stream, you can utilize a tool like Gson in your Java application:

try (
    Reader reader = new InputStreamReader(
        Runtime.getRuntime().exec("curl -h").getInputStream()
    )
) {
    JsonElement element = new JsonParser().parse(reader);
}

Answer 8

To retrieve and parse JSON data from a stream, you can utilize a tool like Gson in your Java application:

try (
    Reader reader = new InputStreamReader(
        Runtime.getRuntime().exec("curl -h").getInputStream()
    )
) {
    JsonElement element = new JsonParser().parse(reader);
}

Guide on incorporating curl in Java and extracting JSON feedback

Answer №1

Answer №2

Answer №3

Answer №4

Similar questions

The Swift HTTP request is missing any post data

Can TestNG allow for the implementation of global parameters?

Having difficulty in closing the chat box that has been opened in a web application

Navigating through Leaflet to reference a .json file

Issue with array merging/inserting feature not functioning as expected

Struggling with understanding how to parse JSON in VB.net

Converting a Map to Json in Play Scala: A Step-by-Step Guide

Error: Unable to retrieve data through Ajax request

Chrome PWA debugger fails to respond when attempting to use the "add to homescreen" button

Understanding JSON Parsing in Jade

Totally clueless when it comes to JSON

Locate a specific data point within an array of JSON objects

What is the best way to iterate over JSON data and organize the output based on the key value?

Angular's GET request response is returning an "Undefined" value instead of the

Utilizing a JSON object to send data to a C# WebAPI POST endpoint that accepts a parameter of a generic abstract class

How to designate the specific container to be updated in the XMLHTTP JSON code within a Joomla website?

Creating an if-else statement in PHP based on a JSON response - what's the best way to

Registering your phone with Gigya

Using Python for Web Scraping and Converting JSON Data to CSV

The function echo json_encode($row) is outputting repetitive values