JAX-RS文件下载,多种内容类型
让我先提供一些背景信息.我正在与Microsoft SharePoint 2010集成的系统上工作,不是真的以SharePoint为系统,而是它的文件系统,文档库等的虚拟表示.用户将文件上传到SharePoint,并且我的系统监视这些文件并为它们建立索引进入搜索引擎(包括文件内容).用户可以通过REST接口与此系统进行交互.
Let me provide some context first. I am working on a system that integrates with Microsoft SharePoint 2010, well not really SharePoint as a system but the virtual representation of it's filesystem, document libraries, etc... Users upload files to SharePoint, and my system monitors these files and indexes them into a search engine (including file content). User can interact with this system by means of REST interfaces.
我创建了一个REST接口来为用户获取文件,该文件对应于我的搜索引擎中的某个条目.这使用绝对网络路径作为其标识符.一个示例是//corporateserver//library1/filex.docx
.由于相同的原始策略,但是我无法加载此文件客户端.因此,我正在尝试通过服务器进行传输.
I have created a REST interface to fetch a file for the user corresponding a certain entry in my search engine. This uses the absolute network path as its identifier. An example would be //corporateserver//library1/filex.docx
. Due to the same origin policy however I can not load this file client side. Therefore I am trying to transmit it via the server.
我使用JAX-RS传输数据取得了一些成功,但是,我陷入了以下困境:
I had some success using JAX-RS to transmit data, however, I am getting stuck at the following:
用户希望下载的文件可以是多种内容类型,其中大多数是Microsoft Office格式.我浏览了已注册的MIME类型的列表,并发现了application/msword
或application/vnd.ms-powerpoint
The file the user wishes to download can be of mutliple content types, most of them will be microsoft office formats. I had a look through the list of registered MIME types and came across application/msword
or application/vnd.ms-powerpoint
我的问题:是否有包含Microsoft Office文件的内容类型?如果不是,那么如何继续将正确的内容类型与所请求的文件进行匹配.如果将一个内容类型为text/plain
的word文件放入服务器,将会发生什么情况?
My question: is there a content type that would include Microsoft Office files? If not, how could one proceed to match the correct content types with a file that is being requested. What would happen if one would server a word file with content type text/plain
?
在此问题上的任何帮助将不胜感激.
Any help on the subject would be greatly appreciated.
编辑
我用来传输数据的代码:
The code I use to transmit data:
package com.fujitsu.consensus.rest;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.OutputStream;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.QueryParam;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.StreamingOutput;
import org.apache.commons.io.IOUtils;
import org.codehaus.jettison.json.JSONException;
@Path("/fetcher")
public class FetcherService {
@GET
@Path("/fetch")
@Produces(MediaType.APPLICATION_OCTET_STREAM)
public Response fetchFile(@QueryParam("path") String path)
throws JSONException, IOException {
final File file = new File(path);
System.out.println(path);
StreamingOutput stream = new StreamingOutput() {
@Override
public void write(OutputStream output) throws IOException {
try {
output.write(IOUtils.toByteArray(new FileInputStream(file)));
} catch (Exception e) {
e.printStackTrace();
}
}
};
return Response.ok(stream, MediaType.APPLICATION_OCTET_STREAM)
.header("Content-Disposition", "inline; filename=\"" + file.getName() + "\"")
.build();
}
}
JavaScript代码:
JavaScript code:
$.ajax({
url: "../rest/fetcher/fetch",
type: "GET", //send it through get method
data:{path:obj.id},
success: function(response) {
console.log(response);},
error: function(xhr) {//Do Something to handle error}
});
我在客户端得到的响应:
The response I get on client side:
编辑2
我添加了HTTP跟踪,以证明实际上已传输了头和数据,但是未显示下载对话框.
I've added a HTTP trace as proof that the headers and data are in fact being transmitted, the download dialogue however is not shown.
Content-Disposition
标头似乎无法与内联或附件一起使用.
The Content-Disposition
header does not appear to be working with either inline or attachment.
您可以使用application/octet-stream
作为内容类型,并执行以下操作来下载文件:
You could use application/octet-stream
as content type and do the following to download files:
@GET
@Produces(MediaType.APPLICATION_OCTET_STREAM)
public Response downloadFile(String fileName) {
File file = ... // Find your file
return Response.ok(file, MediaType.APPLICATION_OCTET_STREAM)
.header("Content-Disposition", "attachment; filename=\"" + file.getName() + "\"")
.build();
}
由于您正在使用JavaScript下载文件,因此请在此处和
Since you are using JavaScript to download files, have a look here and here.