Curly HTTP Client Framework Frequently Asked Questions Answers and Failure Exclusion
Curly HTTP Client Framework Frequently Asked Questions Answers and Failure Exclusion
Curly HTTP Client is an open source framework for HTTP requests in Java.It provides a simple and easy -to -use API that allows developers to easily conduct HTTP communication.However, some common problems and faults may be encountered during use.This article will introduce some common problems and provide some solutions and Java code examples.
Question 1: How to send GET requests?
It is very simple to send GET requests using Curly HTTP Client.The following is an example code that sends GET requests:
import com.google.gson.Gson;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;
public class Main {
public static void main(String[] args) {
OkHttpClient client = new OkHttpClient();
Request request = new Request.Builder()
.url("https://api.example.com/users")
.get()
.build();
try {
Response response = client.newCall(request).execute();
String responseBody = response.body().string();
// Analyze the return result
Gson gson = new Gson();
User[] users = gson.fromJson(responseBody, User[].class);
// Treatment back results
for (User user : users) {
System.out.println(user.getName());
}
} catch (IOException e) {
e.printStackTrace();
}
}
private static class User {
private String name;
public String getName() {
return name;
}
}
}
The above code first created an OKHTTPClient instance and built a GET request through request.builder.Then use client.newcall (request) .execute () to send a request and get a response.Finally, the return result can be processed by parsing the main part of the response.
Question 2: How to send post requests?
Similar to sending GET requests, it is easy to send POST requests.The following is an example code that sends post requests:
import okhttp3.MediaType;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.RequestBody;
import okhttp3.Response;
import java.io.IOException;
public class Main {
public static void main(String[] args) {
OkHttpClient client = new OkHttpClient();
MediaType mediaType = MediaType.parse("application/json");
String requestBody = "{\"username\":\"john\", \"password\":\"secret\"}";
RequestBody body = RequestBody.create(mediaType, requestBody);
Request request = new Request.Builder()
.url("https://api.example.com/login")
.post(body)
.build();
try {
Response response = client.newCall(request).execute();
String responseBody = response.body().string();
// Treatment back results
System.out.println(responseBody);
} catch (IOException e) {
e.printStackTrace();
}
}
}
The above code first created an OKHTTPClient instance.Then, use the MediaType.parse () method to specify the requested Content-Type as "Application/JSON" to create the request body RequestBody.Next, build a post request through Request.builder and pass the requestbody as a parameter.Finally, send the request and process the return result.
Question 3: How to deal with the return result of the http request?
Curly HTTP Client uses a response object to represent the return result of the http request.Through the Response object, you can obtain the status code, head information and main content of the response.The following is a sample code for processing the return result:
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;
import java.io.IOException;
public class Main {
public static void main(String[] args) {
OkHttpClient client = new OkHttpClient();
Request request = new Request.Builder()
.url("https://api.example.com/users")
.get()
.build();
try {
Response response = client.newCall(request).execute();
// Get the status code
int statusCode = response.code();
System.out.println("Status code: " + statusCode);
// Get head information
String contentType = response.header("Content-Type");
System.out.println("Content-Type: " + contentType);
// Get the main content
String responseBody = response.body().string();
System.out.println("Response body: " + responseBody);
} catch (IOException e) {
e.printStackTrace();
}
}
}
In the above code, the status code is obtained through the response.code () method, and the response.header () method is obtained to the specified head field value.
The above is the content of the common questions and failure exclusion of the Curly HTTP Client framework. I hope it will be helpful to you!
