我正在尝试更改请求中的Content-Type标头,并在它到达我的Spring rest控制器之前将其更改为“application / json”。我创建了一个servlet请求包装器来更改值,但是当请求到达控制器时它仍然是“text / plain”。日志记录显示在更改doFilter();
之前标题值已更改这是我的类扩展HttpServletRequestWrapper
NaN
这是我的过滤器:
class HttpServletRequestWritableWrapper extends HttpServletRequestWrapper {
private final Logger logger = org.slf4j.LoggerFactory.getLogger(HttpServletRequestWritableWrapper.class);
private final ByteArrayInputStream decryptedBody;
HttpServletRequestWritableWrapper(HttpServletRequest request, byte[] decryptedData) {
super(request);
decryptedBody = new ByteArrayInputStream(decryptedData);
}
@Override
public String getHeader(String name) {
String headerValue = super.getHeader(name);
if("Accept".equalsIgnoreCase(name))
{
logger.debug("Accept header changing :");
return headerValue.replaceAll(
MediaType.TEXT_PLAIN_VALUE, MediaType.APPLICATION_JSON_VALUE
);
}
else if ("Content-Type".equalsIgnoreCase(name))
{
logger.debug("Content type change: ");
return headerValue.replaceAll(MediaType.TEXT_PLAIN_VALUE, MediaType.APPLICATION_JSON_VALUE);
}
return headerValue;
}
@Override
public Enumeration<String> getHeaderNames() {
return super.getHeaderNames();
}
@Override
public String getContentType() {
String contentTypeValue = super.getContentType();
if (MediaType.TEXT_PLAIN_VALUE.equalsIgnoreCase(contentTypeValue)) {
logger.debug("Changing on getContentType():");
return MediaType.APPLICATION_JSON_VALUE;
}
return contentTypeValue;
}
@Override
public BufferedReader getReader() throws UnsupportedEncodingException {
return new BufferedReader(new InputStreamReader(decryptedBody, UTF_8));
}
@Override
public ServletInputStream getInputStream() throws IOException {
return new ServletInputStream() {
@Override
public int read() {
return decryptedBody.read();
}
};
}
答案 0 :(得分:1)
看来getHeaders方法是在我的过滤器之后的其他地方调用的,而不是使用我更新的值返回标头。
我在我的HttpServletRequestWrapper中添加了这个覆盖,它现在正在工作:
@Override
public Enumeration<String> getHeaders(String name) {
List<String> headerVals = Collections.list(super.getHeaders(name));
int index = 0;
for (String value : headerVals) {
if ("Content-Type".equalsIgnoreCase(name)) {
logger.debug("Content type change: ");
headerVals.set(index, MediaType.APPLICATION_JSON_VALUE);
}
index++;
}
return Collections.enumeration(headerVals);
}