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Add multipart entity

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main
Nic0Nic0Nii 3 years ago
parent f3ff26fa01
commit 92f9f247f7
3 changed files with 280 additions and 5 deletions
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  1. 151
      sig/MultipartUtility.java
  2. 29
      sig/requests/POSTRequest.java
  3. 105
      test.json

151
sig/MultipartUtility.java
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@ -0,0 +1,151 @@
package sig;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLConnection;
import java.util.ArrayList;
import java.util.List;
/**
* This utility class provides an abstraction layer for sending multipart HTTP
* POST requests to a web server.
* @author www.codejava.net
*
*/
public class MultipartUtility {
private final String boundary;
private static final String LINE_FEED = "\r\n";
private HttpURLConnection httpConn;
private String charset;
private OutputStream outputStream;
private PrintWriter writer;
/**
* This constructor initializes a new HTTP POST request with content type
* is set to multipart/form-data
* @param requestURL
* @param charset
* @throws IOException
*/
public MultipartUtility(String requestURL, String charset)
throws IOException {
this.charset = charset;
// creates a unique boundary based on time stamp
boundary = "===" + System.currentTimeMillis() + "===";
URL url = new URL(requestURL);
httpConn = (HttpURLConnection) url.openConnection();
httpConn.setUseCaches(false);
httpConn.setDoOutput(true); // indicates POST method
httpConn.setDoInput(true);
httpConn.setRequestProperty("Content-Type",
"multipart/form-data; boundary=" + boundary);
httpConn.setRequestProperty("User-Agent", "CodeJava Agent");
httpConn.setRequestProperty("Test", "Bonjour");
outputStream = httpConn.getOutputStream();
writer = new PrintWriter(new OutputStreamWriter(outputStream, charset),
true);
}
/**
* Adds a form field to the request
* @param name field name
* @param value field value
*/
public void addFormField(String name, String value) {
writer.append("--" + boundary).append(LINE_FEED);
writer.append("Content-Disposition: form-data; name=\"" + name + "\"")
.append(LINE_FEED);
writer.append("Content-Type: text/plain; charset=" + charset).append(
LINE_FEED);
writer.append(LINE_FEED);
writer.append(value).append(LINE_FEED);
writer.flush();
}
/**
* Adds a upload file section to the request
* @param fieldName name attribute in <input type="file" name="..." />
* @param uploadFile a File to be uploaded
* @throws IOException
*/
public void addFilePart(String fieldName, File uploadFile)
throws IOException {
String fileName = uploadFile.getName();
writer.append("--" + boundary).append(LINE_FEED);
writer.append(
"Content-Disposition: form-data; name=\"" + fieldName
+ "\"; filename=\"" + fileName + "\"")
.append(LINE_FEED);
writer.append(
"Content-Type: "
+ URLConnection.guessContentTypeFromName(fileName))
.append(LINE_FEED);
writer.append("Content-Transfer-Encoding: binary").append(LINE_FEED);
writer.append(LINE_FEED);
writer.flush();
FileInputStream inputStream = new FileInputStream(uploadFile);
byte[] buffer = new byte[4096];
int bytesRead = -1;
while ((bytesRead = inputStream.read(buffer)) != -1) {
outputStream.write(buffer, 0, bytesRead);
}
outputStream.flush();
inputStream.close();
writer.append(LINE_FEED);
writer.flush();
}
/**
* Adds a header field to the request.
* @param name - name of the header field
* @param value - value of the header field
*/
public void addHeaderField(String name, String value) {
writer.append(name + ": " + value).append(LINE_FEED);
writer.flush();
}
/**
* Completes the request and receives response from the server.
* @return a list of Strings as response in case the server returned
* status OK, otherwise an exception is thrown.
* @throws IOException
*/
public List<String> finish() throws IOException {
List<String> response = new ArrayList<String>();
writer.append(LINE_FEED).flush();
writer.append("--" + boundary + "--").append(LINE_FEED);
writer.close();
// checks server's status code first
int status = httpConn.getResponseCode();
if (status == HttpURLConnection.HTTP_OK) {
BufferedReader reader = new BufferedReader(new InputStreamReader(
httpConn.getInputStream()));
String line = null;
while ((line = reader.readLine()) != null) {
response.add(line);
}
reader.close();
httpConn.disconnect();
} else {
throw new IOException("Server returned non-OK status: " + status);
}
return response;
}
}

29
sig/requests/POSTRequest.java
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@ -1,23 +1,37 @@
package sig.requests;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLConnection;
import java.net.http.HttpRequest;
import java.net.http.HttpClient.Builder;
import java.nio.file.Path;
import java.util.ArrayList;
import java.util.List;
import sig.exceptions.FailedResponseException;
public class POSTRequest extends GETRequest{
String body = "";
Path uploadFile = null;
public POSTRequest(String url, String body, String username, String password, long timeout, Path file, String... headers) {
super(url, username, password, timeout, file, headers);
public POSTRequest(String url, String body, String username, String password, long timeout, Path outputFile, String... headers) {
super(url, username, password, timeout, outputFile, headers);
this.body=body;
}
public POSTRequest(String url, String body, long timeout, Path file, String... headers) {
super(url, timeout, file, headers);
public POSTRequest(String url, String body, long timeout, Path outputFile, String... headers) {
super(url, timeout, outputFile, headers);
this.body=body;
}
@ -31,6 +45,11 @@ public class POSTRequest extends GETRequest{
this.body=body;
}
public POSTRequest(String url, Path uploadFile) {
super(url);
this.uploadFile=uploadFile;
}
@Override
protected java.net.http.HttpRequest.Builder finalizeRequestPreBuild(
java.net.http.HttpRequest.Builder requestBuild) throws FailedResponseException{
@ -50,4 +69,4 @@ public class POSTRequest extends GETRequest{
return clientBuild;
}
}
}

105
test.json
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@ -0,0 +1,105 @@
{
"args": {},
"data": {
"args": {},
"data": {
"args": {
"foo1": "bar1",
"foo2": "bar2"
},
"headers": {
"x-forwarded-proto": "https",
"x-forwarded-port": "443",
"host": "postman-echo.com",
"x-amzn-trace-id": "Root=1-6268427f-1fb34bbf61bee0cc55bcfced",
"default": "value",
"user-agent": "Java-http-client/11.0.13"
},
"url": "https://postman-echo.com/get?foo1=bar1&foo2=bar2"
},
"files": {},
"form": {},
"headers": {
"x-forwarded-proto": "https",
"x-forwarded-port": "443",
"host": "postman-echo.com",
"x-amzn-trace-id": "Root=1-6287d143-6d0b63bb5323290e00ed4cdd",
"content-length": "305",
"content-type": "application/json",
"user-agent": "Java-http-client/11.0.13"
},
"json": {
"args": {
"foo1": "bar1",
"foo2": "bar2"
},
"headers": {
"x-forwarded-proto": "https",
"x-forwarded-port": "443",
"host": "postman-echo.com",
"x-amzn-trace-id": "Root=1-6268427f-1fb34bbf61bee0cc55bcfced",
"default": "value",
"user-agent": "Java-http-client/11.0.13"
},
"url": "https://postman-echo.com/get?foo1=bar1&foo2=bar2"
},
"url": "https://postman-echo.com/post"
},
"files": {},
"form": {},
"headers": {
"x-forwarded-proto": "https",
"x-forwarded-port": "443",
"host": "postman-echo.com",
"x-amzn-trace-id": "Root=1-6287d178-5fa9648d07a57aa20d5b8e0f",
"content-length": "945",
"content-type": "application/json",
"user-agent": "Java-http-client/11.0.13"
},
"json": {
"args": {},
"data": {
"args": {
"foo1": "bar1",
"foo2": "bar2"
},
"headers": {
"x-forwarded-proto": "https",
"x-forwarded-port": "443",
"host": "postman-echo.com",
"x-amzn-trace-id": "Root=1-6268427f-1fb34bbf61bee0cc55bcfced",
"default": "value",
"user-agent": "Java-http-client/11.0.13"
},
"url": "https://postman-echo.com/get?foo1=bar1&foo2=bar2"
},
"files": {},
"form": {},
"headers": {
"x-forwarded-proto": "https",
"x-forwarded-port": "443",
"host": "postman-echo.com",
"x-amzn-trace-id": "Root=1-6287d143-6d0b63bb5323290e00ed4cdd",
"content-length": "305",
"content-type": "application/json",
"user-agent": "Java-http-client/11.0.13"
},
"json": {
"args": {
"foo1": "bar1",
"foo2": "bar2"
},
"headers": {
"x-forwarded-proto": "https",
"x-forwarded-port": "443",
"host": "postman-echo.com",
"x-amzn-trace-id": "Root=1-6268427f-1fb34bbf61bee0cc55bcfced",
"default": "value",
"user-agent": "Java-http-client/11.0.13"
},
"url": "https://postman-echo.com/get?foo1=bar1&foo2=bar2"
},
"url": "https://postman-echo.com/post"
},
"url": "https://postman-echo.com/post"
}
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