关于weblogic下Did not meet stated content length of OutputStream异常
这段时间做上海公共地理信息服务平台的时候，卡在了webservice在C#中的调用上，因为我们的服务发布要进行控制，所以就做了个代理，在代理里分析了当前服务的权限后再经过后台请求转发原服务地址，代码如下：public Document loadByUrlAndDoc(HttpServletRequest req, String url, Document doc) {
Document resultDoc = null;
SAXReader saxReader = new SAXReader();
HttpURLConnection connection = null;
InputStream cin = null;
OutputStream out = null;
XMLWriter writer = null;
try {
URL httpURL = new URL(url);
connection = (HttpURLConnection) httpURL.openConnection();
connection.setDoInput(true);
connection.setDoOutput(true);
if(doc != null){
connection.setRequestMethod("POST");
connection.setRequestProperty("SOAPAction",
"http://www.example.org/TopoAnalyse/DownStream");
}
else{
connection.setRequestMethod("GET");
}
connection.setRequestProperty("", "");
connection.setConnectTimeout(30000);
connection.setReadTimeout(30000);
//此处将表头中的所有属性都加载到转发请求中了
for(Enumeration enum1 = req.getHeaderNames(); enum1.hasMoreElements(); ){
String header = (String)enum1.nextElement();
String value = req.getHeader(header);
connection.setRequestProperty(header, value);
log.info("header:"+header+" value:"+value);
}
if(doc != null){
out = connection.getOutputStream();
OutputFormat format = OutputFormat.createCompactFormat();
format.setEncoding("UTF-8");
writer = new XMLWriter(out, format);
writer.write(doc);
writer.flush();
}
cin = connection.getInputStream();
BufferedInputStream bci = new BufferedInputStream(cin);
resultDoc = saxReader.read(bci);
} catch (Exception e) {
log.info(e);
} finally {
if (out != null) {
try {
out.close();
} catch (IOException e) {
log.info(e);
}
}
if (writer != null) {
try {
writer.close();
} catch (IOException e) {
log.info(e);
}
}
if (cin != null) {
try {
cin.close();
} catch (IOException e) {
log.info(e);
}
}
if(connection != null) {
connection.disconnect();
}
}
return resultDoc;
}
之后再WebLogic中报以下错误（在tomcat中没问题）
Did not meet stated content length of OutputStream: you wrote 0 bytes and I was expecting you to write exactly 187 bytes!!!
分析了很久最后发现是在装载表头的时候把ContentLength也设置进去了
最后将contentlength从表头中去除就OK乐
去掉表头中contentlength的方法如下：
for(Enumeration enum1 = req.getHeaderNames(); enum1.hasMoreElements(); ){
String header = (String)enum1.nextElement();
String value = req.getHeader(header);
if(header！="content-length")
connection.setRequestProperty(header, value);
log.info("header:"+header+" value:"+value);
}
还有一种方法，如下：
请检查web应用中的servlet代码查看是否设置了长度。也可以做下面的修改来解决这个问题：
response.setContentLength(0);
……
……
response.flushBuffer();
return;
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