[英]Get POST Content from HttpServletRequest
我想從Java Servlet中的POST請求中讀取數據。 該servlet作為服務運行在Geoserver上,並使用URL進行調用。
POST請求(使用python腳本創建):
POST http://localhost:8080/geoserver/ows?request=upload&service=GeoTransfer&version=1.0.0 HTTP/1.1
Host: localhost:8080
User-Agent: python-requests/2.20.0
Accept-Encoding: gzip, deflate
Accept: application/xml
Connection: keep-alive
Authorization: admin:admin
fileName: transfer.xml
Content-Type: application/xml
Content-Length: 489
<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>
<transfer>
<enviroment>Test</enviroment>
<product>Testproduct</product>
<user>admin</user>
</transfer>
Java Servlet:
public void upload(HttpServletRequest request, httpServletResponse response)
throws ServletException, IOException {
System.out.println("===== Begin headers =====");
Enumeration<String> names = request.getHeaderNames();
while (names.hasMoreElements()) {
String headerName = names.nextElement();
System.out.println(headerName + " = " + request.getHeader(headerName));
}
System.out.println("===== End headers =====\n");
System.out.println("===== Begin Body =====");
if ("POST".equalsIgnoreCase(request.getMethod())) {
try {
Scanner s = new Scanner(request.getInputStream(), "UTF-8").useDelimiter("\\A");
System.out.println(s.hasNext() ? s.next() : "");
} catch (IOException e) {
e.printStackTrace();
}
}
System.out.println("===== End Body =====\n");
}
輸出:
===== Begin headers =====
Authorization = admin:admin
fileName = transfer.xml
Accept = application/xml
User-Agent = python-requests/2.20.0
Connection = keep-alive
Host = localhost:8080
Accept-Encoding = gzip, deflate
Content-Length = 489
Content-Type = application/xml
===== End headers =====
===== Begin Body =====
===== End Body =====
問題:
為什么我無法讀出xml數據正文? 請求有問題,數據沒有傳遞給Java嗎?
EDIT1:
使用Inputstream嘗試其他方法,但主體始終為空行。 如果服務器創建請求對象,服務器會忽略主體而僅使用標頭,可能是這樣的問題嗎?
EDIT2:
嘗試Majid Khakwani答案並獲取空字符串。 我打印出request.getContentLength()
,它是489
。 該方法是否從對象請求的標題或內容的實際長度中獲取了此數字?
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String xml = null;
try {
byte[] xmlData = new byte[request.getContentLength()];
//Start reading XML Request as a Stream of Bytes
InputStream sis = request.getInputStream();
BufferedInputStream bis = new BufferedInputStream(sis);
bis.read(xmlData, 0, xmlData.length);
if (request.getCharacterEncoding() != null) {
xml = new String(xmlData, request.getCharacterEncoding());
} else {
xml = new String(xmlData);
}
//xml and xmlData contains incomplete data
} catch (IOException ioe) {
...
}
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