Azkaban的Web Server源码探究系列18：上传flow涉及的过程分析

上节涉及到上传flow,图为

对应的servlet是：

root.addServlet(new ServletHolder(new ProjectManagerServlet()), "/manager");

stop in azkaban.webapp.servlet.ProjectManagerServlet.doPost

下面来debug这个过程！

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首先是request的文件提取，代码为：

@SuppressWarnings("unchecked")

public Map<String, Object> parseMultipart(HttpServletRequest request)

throws IOException, ServletException {

// org.apache.commons.fileupload.servlet.ServletFileUpload

ServletFileUpload upload = new ServletFileUpload(_uploadItemFactory);

List<FileItem> items = null;

try {

//基于commons-upload解析

items = upload.parseRequest(request);

} catch (FileUploadException e) {

throw new ServletException(e);

}

Map<String, Object> params = new HashMap<String, Object>();

for (FileItem item : items) {

//开始遍历

if (item.isFormField())

params.put(item.getFieldName(), item.getString());

else

params.put(item.getFieldName(), item);

}

return params;

}

Step completed: "thread=2067661130@qtp-1640296160-4", azkaban.webapp.servlet.MultipartParser.parseMultipart(), line=57 bci=102

57 params.put(item.getFieldName(), item);

2067661130@qtp-1640296160-4[1] print item

item = "name=firstflow.zip, StoreLocation=/tmp/upload_517889bb_131b_4a07_b77b_d926a43bd759_00000000.tmp, size=375 bytes, isFormField=false, FieldName=file"

上面都是上传文件的东西，没啥好说的，azkaban会把zip文件解压缩

然后传给validator来解析，这里是DirectoryFlowLoader验证

这个要分几个小节来说，下回分解！

来源：oschina

链接：https://my.oschina.net/u/1382024/blog/655687

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