多篇文章-上传文件 [英] multipart post -- uploading a file
本文介绍了多篇文章-上传文件的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我正在尝试通过程序而不是网站将文件上传到服务器.我已经成功访问了该网站，可以剪贴/解析不同的网页，但是上传文件时遇到问题.有问题的服务器正在使用带有Apache挂毯的剪纸.
I am trying to upload a file to a server programmatically rather than the website. I have successfully accessed the website and can scrap/parse different web pages but I am having trouble uploading a file. The server in question is using papercut with apache tapestry.
这是相关的Java代码:
here is the relevant java code:
private String uploadFile (String params, String filePath, String HTML) throws Exception {
String postUrl = getUploadUrl(HTML);
File fileToUpload = new File(filePath);
postUrl = "http://printing.**.ca:9191" + postUrl;
String random = "";
Random ran = new Random();
for (int i = 0; i < 28; i++) {
random = random + String.valueOf(ran.nextInt(9));
}
String boundry = "---------------------------" + random;
URL obj = new URL(postUrl);
connection = (HttpURLConnection)obj.openConnection();
connection.setUseCaches(false);
connection.setRequestMethod("POST");
connection.setRequestProperty("Content-Type", "multipart/form-data; boundary=" + boundry);
connection.setRequestProperty("Host", "printing.**.ca:9191");
connection.setRequestProperty("User-Agent", USER_AGENT);
connection
.setRequestProperty("Accept",
"text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8");
connection.setRequestProperty("Accept-Language", "en-US,en;q=0.5");
connection.setRequestProperty("Referer",
"http://printing.**.ca:9191/app");
connection.setRequestProperty("Connection", "keep-alive");
for (String cookie : this.cookies) {
connection.addRequestProperty("Cookie", cookie.split(";", 1)[0]);
}
connection.setDoInput(true);
connection.setDoOutput(true);
String fileType = getFileType(fileToUpload);
PrintWriter writer = null;
try {
writer = new PrintWriter(new OutputStreamWriter(connection.getOutputStream()));
writer.println(boundry);
writer.println("Content-Disposition: " + "form-data; " + "name=\"file[]\"; " + "filename=\"" + fileToUpload.getName() + "\"");
writer.println("Content-Type: " + fileType);
writer.println();
BufferedReader reader = null;
try {
reader = new BufferedReader(new InputStreamReader(new FileInputStream(fileToUpload)));
for (String line; (line = reader.readLine()) != null;) {
writer.print(line);
}
} finally {
if (reader != null) {
try {
reader.close();
} catch (IOException e) {}
}
}
writer.println(boundry + "--");
} finally {
if (writer != null) {
writer.close();
}
}
int responseCode = connection.getResponseCode();
BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
StringBuffer buffer = new StringBuffer();
String inputLine;
while((inputLine = reader.readLine()) != null) {
buffer.append(inputLine);
}
reader.close();
return null;
我曾经用鲨鱼来比较成功的请求和失败的请求，但我无法确定哪里出了错.
I have used wire shark to compare a successful request and my failed request and I cannot determine where I have gone wrong.
这是成功的请求:
POST /upload/3229 HTTP/1.1
Host: printing.**.ca:9191
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9; rv:33.0) Gecko/20100101 Firefox/33.0
Accept: application/json
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Cache-Control: no-cache
X-Requested-With: XMLHttpRequest
Referer: http://printing.**.ca:9191/app
Content-Length: 27682
Content-Type: multipart/form-data; boundary=---------------------------8555452061745260577115383266
Cookie: JSESSIONID=1w7usft10tnew
Connection: keep-alive
Pragma: no-cache
-----------------------------8555452061745260577115383266
Content-Disposition: form-data; name="file[]"; filename="hello.xls"
Content-Type: application/vnd.ms-excel
**data***
-----------------------------8555452061745260577115383266--
这将返回200/ok 然后开火:
this returns a 200/ok then fires off:
POST /app HTTP/1.1
Host: printing.**.ca:9191
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9; rv:33.0) Gecko/20100101 Firefox/33.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Referer: http://printing.**.ca:9191/app
Cookie: org.apache.tapestry.locale=en; JSESSIONID=1w7usft10tnew
Connection: keep-alive
Content-Type: application/x-www-form-urlencoded
Content-Length: 66
service=direct%2F1%2FUserWebPrintUpload%2F%24Form%240&sp=S1&Form1=
这是我的请求中的数据包:
This is the packet from my request:
POST /upload/3239 HTTP/1.1
Content-Type: multipart/form-data; boundary=---------------------------6735033783816657573427817664
User-Agent: Mozilla/5.0
Accept: application/json
Accept-Language: en-US,en;q=0.5
Referer: http://printing.**.ca:9191/app
X-Requested-With: XMLHttpRequest
Cache-Control: no-cache
Pragma: no-cache
Host: printing.**.ca:9191
Connection: keep-alive
Content-Length: 46431
Cookie: JSESSIONID=1i2ym6tnouzkw;
---------------------------6735033783816657573427817664
Content-Disposition: form-data; name="file[]"; filename="hello.xls"
Content-Type: application/vnd.ms-excel
**data*
---------------------------6735033783816657573427817664--
然后我得到200/ok 发射这个:
then I get a 200/ok fire this:
POST /app HTTP/1.1
User-Agent: Mozilla/5.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Referer: http://printing.**.ca:9191/app
Content-Type: application/x-www-form-urlencoded
Cache-Control: no-cache
Pragma: no-cache
Host: printing.**.ca:9191
Connection: keep-alive
Content-Length: 66
Cookie: JSESSIONID=1i2ym6tnouzkw;
service=direct%2F1%2FUserWebPrintUpload%2F%24Form%240&sp=S1&Form1=
，并在上传文件响应时出错.对于/upload/3239，我将刮除包含上传文件形式的HTML.该网站还使用Dropzone.js，但可以使用简单的上传表单进行回退. 此外，对于会话cookie，字符;"在所有其他请求上发送，没有任何失败.我可以访问该网站，但是似乎无法正确上传该文件.
and get an error uploading the file response. For /upload/3239, I scrape the HTML that contains the form the upload the file. The website also uses Dropzone.js, but has the ability to fallback on a simple upload form. Also for the session cookie the character ";" is sent on all the other requests and nothing fails. I have access to the website, it just doesn't seem to be able to upload the file correctly.
想法?
推荐答案
最后花了几个小时来弄清楚如何使用apache HttpClient来做到这一点.这是将来任何人的代码.
Ended up spending the past few hours figuring out how to do it with apache HttpClient. Here is the code for anyone in the future.
private String uploadFile (String filePath, String HTML) throws Exception {
String postUrl = getUploadUrl(HTML);
postUrl = "http://printing.**.ca:9191" + postUrl;
HttpPost post = new HttpPost(postUrl);
HttpClient client = new DefaultHttpClient();
MultipartEntityBuilder builder = MultipartEntityBuilder.create();
builder.setMode(HttpMultipartMode.BROWSER_COMPATIBLE);
String random = "";
Random ran = new Random();
for (int i = 0; i < 28; i++) {
random = random + String.valueOf(ran.nextInt(9));
}
String boundary = "---------------------------" + random;
final File file = new File(filePath);
FileBody fb = new FileBody(file, ContentType.create("application/vnd.ms-excel"), "hello.xls");
builder.addPart("file[];", fb);
builder.setBoundary(boundary);
post.setEntity(builder.build());
post.setHeader("Host", "printing.**.ca:9191");
post.setHeader("User-Agent", USER_AGENT);
post.setHeader("Accept",
"text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8");
post.setHeader("Accept-Language", "en-US,en;q=0.5");
post.setHeader("Referer",
"http://printing.**.ca:9191/app");
post.setHeader("Connection", "keep-alive");
for (String cookie : this.cookies) {
for (String c : cookie.split(";")) {
if (c.contains("JSESSION")) {
post.setHeader("Cookie", c);
}
}
}
HttpResponse response = client.execute(post);
String reply = sendPost("http://printing.**.ca:9191/app", getUploadParameters(HTML));
return response.toString();
}
这篇关于多篇文章-上传文件的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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