[英]How do I write a restful web service that accepts a binary file (pdf)
我正在嘗試在java中編寫一個寧靜的Web服務,它將采用一些字符串參數和一個二進制文件(pdf)參數。
我理解如何做字符串,但我已經掛斷了二進制文件。 任何想法/例子?
這是我到目前為止所擁有的
@GET
@ConsumeMime("multipart/form-data")
@ProduceMime("text/plain")
@Path("submit/{client_id}/{doc_id}/{html}/{password}")
public Response submit(@PathParam("client_id") String clientID,
@PathParam("doc_id") String docID,
@PathParam("html") String html,
@PathParam("password") String password,
@PathParam("pdf") File pdf) {
return Response.ok("true").build();
}
由於我發布了這個已刪除答案的鏈接,所以這是我的實現。
@POST
@Consumes(MediaType.MULTIPART_FORM_DATA)
@Produces(MediaType.TEXT_PLAIN)
@Path("submit")
public Response submit(@FormDataParam("clientID") String clientID,
@FormDataParam("html") String html,
@FormDataParam("pdf") InputStream pdfStream) {
try {
byte[] pdfByteArray = DocUtils.convertInputStreamToByteArrary(pdfStream);
} catch (Exception ex) {
return Response.status(600).entity(ex.getMessage()).build();
}
}
...
public static byte[] convertInputStreamToByteArrary(InputStream in) throws IOException {
ByteArrayOutputStream out = new ByteArrayOutputStream();
final int BUF_SIZE = 1024;
byte[] buffer = new byte[BUF_SIZE];
int bytesRead = -1;
while ((bytesRead = in.read(buffer)) > -1) {
out.write(buffer, 0, bytesRead);
}
in.close();
byte[] byteArray = out.toByteArray();
return byteArray;
}
@POST
@Consumes(MediaType.MULTIPART_FORM_DATA)
@Produces(MediaType.TEXT_PLAIN)
@Path("submit")
public Response submit(@FormDataParam("clientID") String clientID,
@FormDataParam("html") String html,
@FormDataParam("pdf") InputStream pdfStream) {
try {
byte[] pdfByteArray = DocUtils.convertInputStreamToByteArrary(pdfStream);
} catch (Exception ex) {
return Response.status(600).entity(ex.getMessage()).build();
}
}
...
public static byte[] convertInputStreamToByteArrary(InputStream in) throws IOException {
ByteArrayOutputStream out = new ByteArrayOutputStream();
final int BUF_SIZE = 1024;
byte[] buffer = new byte[BUF_SIZE];
int bytesRead = -1;
while ((bytesRead = in.read(buffer)) > -1) {
out.write(buffer, 0, bytesRead);
}
in.close();
byte[] byteArray = out.toByteArray();
return byteArray;
}
您可以將二進制附件存儲在請求正文中。 或者,請在此處查看此郵件列表存檔:
http://markmail.org/message/dvl6qrzdqstrdtfk
它建議使用Commons FileUpload來獲取文件並適當地上傳它。
這里使用MIME多部分API的另一種選擇:
需要Jar文件(從Apache站點下載):commons-fileupload.jar,commons-io.jar
package com.sms.web;
import java.io.File;
import java.util.Iterator;
import java.util.List;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.core.Context;
import javax.servlet.http.HttpServletRequest;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
@Path("/UploadTest")
public class UploadData {
@POST
// public String upload(@Context HttpServletRequest request, @PathParam("myfile") String fileName) throws Exception {
public String upload(@Context HttpServletRequest request) throws Exception {
String response = "none";
if (ServletFileUpload.isMultipartContent(request)) {
response="got file in request";
// Create a factory for disk-based file items
DiskFileItemFactory fileItemFactory = new DiskFileItemFactory();
String path = request.getRealPath("") + File.separatorChar + "publishFiles" + File.separatorChar;
// File f = new File(path + "myfile.txt");
// File tmpDir = new File("c:\\tmp");
File destinationDir = new File(path);
// Set the size threshold, above which content will be stored on disk.
// fileItemFactory.setSizeThreshold(1*1024*1024); //1 MB
// Set the temporary directory to store the uploaded files of size above threshold.
// fileItemFactory.setRepository(tmpDir);
// Create a new file upload handler
ServletFileUpload uploadHandler = new ServletFileUpload(fileItemFactory);
try {
/*
* Parse the request
*/
List items = uploadHandler.parseRequest(request);
Iterator itr = items.iterator();
while(itr.hasNext()) {
FileItem item = (FileItem) itr.next();
/*
* Handle Form Fields.
*/
if(item.isFormField()) {
response += "<BR>" + "Field Name = "+item.getFieldName()+", Value = "+item.getString();
} else {
//Handle Uploaded files.
response += "<BR>" + "File Field Name = "+item.getFieldName()+
", File Name = "+item.getName()+
", Content type = "+item.getContentType()+
", File Size = "+item.getSize();
/*
* Write file to the ultimate location.
*/
File file = new File(destinationDir,item.getName());
item.write(file);
}
}
}catch(FileUploadException ex) {
response += "Error encountered while parsing the request " + ex;
} catch(Exception ex) {
response += "Error encountered while uploading file " + ex;
}
}
return response;
}
}
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