にjava.io.IOException：サーバー返さ非OK状態：404

Question

出典：http://www.codejava.net/java-se/networking/upload-files-by-sending-multipart-request-programmatically

なぜそれがステータスを返さないのですか？私はあなたがヒットしようとしているリクエストのURL（http://jamthesis.com/images）が存在しないGoDaddyは

にMultipartFileUploader.java

import java.io.File; 
import java.io.IOException; 
import java.util.List; 

public class MultipartFileUploader { 

public static void main(String[] args) { 
    String charset = "UTF-8"; 
    File uploadFile1 = new File("C:/Users/jimmy/Pictures/Artist/TJ Monterde.jpg"); 
    File uploadFile2 = new File("C:/Users/jimmy/Pictures/Artist/Mariah Carey.jpg"); 
    String requestURL = "http://jamthesis.com/images"; 

    try { 
     MultipartUtility multipart = new MultipartUtility(requestURL, charset); 

     //multipart.addHeaderField("User-Agent", "CodeJava"); 
     //multipart.addHeaderField("Test-Header", "Header-Value"); 

     //multipart.addFormField("description", "Cool Pictures"); 
     //multipart.addFormField("keywords", "Java,upload,Spring"); 

     multipart.addFilePart("fileUpload", uploadFile1); 
     multipart.addFilePart("fileUpload", uploadFile2); 

     List<String> response = multipart.finish(); 

     System.out.println("SERVER REPLIED:"); 

     for (String line : response) { 
      System.out.println(line); 
     } 
    } catch (IOException ex) { 
     System.err.println(ex); 
    } 
} } 

MultipartUtility.java

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; 
} } 

Answer 1

を私のファイルマネージャにアクセスしています。だからあなたは404を手に入れています。ファイルをアップロードしようとしているURLを確認してください。