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markt pushed a commit to branch main
in repository https://gitbox.apache.org/repos/asf/tomcat.git
The following commit(s) were added to refs/heads/main by this push:
new 6323898cba Add support for PATCH
6323898cba is described below
commit 6323898cba4223fd462eb388273d06fa451b9e2d
Author: Mark Thomas <[email protected]>
AuthorDate: Wed Mar 1 15:55:50 2023 +0000
Add support for PATCH
---
java/jakarta/servlet/http/HttpServlet.java | 58 ++++++++++++++++++++++-
java/jakarta/servlet/http/LocalStrings.properties | 1 +
webapps/docs/changelog.xml | 9 ++++
3 files changed, 66 insertions(+), 2 deletions(-)
diff --git a/java/jakarta/servlet/http/HttpServlet.java
b/java/jakarta/servlet/http/HttpServlet.java
index aec57d5e56..5f8f90dd8b 100644
--- a/java/jakarta/servlet/http/HttpServlet.java
+++ b/java/jakarta/servlet/http/HttpServlet.java
@@ -74,6 +74,7 @@ public abstract class HttpServlet extends GenericServlet {
private static final String METHOD_HEAD = "HEAD";
private static final String METHOD_GET = "GET";
private static final String METHOD_OPTIONS = "OPTIONS";
+ private static final String METHOD_PATCH = "PATCH";
private static final String METHOD_POST = "POST";
private static final String METHOD_PUT = "PUT";
private static final String METHOD_TRACE = "TRACE";
@@ -133,7 +134,7 @@ public abstract class HttpServlet extends GenericServlet {
* Overriding this method to support a GET request also automatically
supports an HTTP HEAD request. A HEAD request
* is a GET request that returns no body in the response, only the request
header fields.
* <p>
- * When overriding this method, read the request data, write the response
headers, get the response's noBodyWriter
+ * When overriding this method, read the request data, write the response
headers, get the response's Writer
* or output stream object, and finally, write the response data. It's
best to include content type and encoding.
* When using a <code>PrintWriter</code> object to return the response,
set the content type before accessing the
* <code>PrintWriter</code> object.
@@ -225,12 +226,52 @@ public abstract class HttpServlet extends GenericServlet {
}
+ /**
+ * Called by the server (via the <code>service</code> method) to allow a
servlet to handle a PATCH request. The HTTP
+ * PATCH method allows the client to partially modify an existing resource.
+ * <p>
+ * When overriding this method, read the request data and write the
response headers, get the response's Writer
+ * or output stream object, and finally, write the response data. It's
best to include content type and encoding.
+ * When using a <code>PrintWriter</code> object to return the response,
set the content type before accessing the
+ * <code>PrintWriter</code> object.
+ * <p>
+ * The servlet container must write the headers before committing the
response, because in HTTP the headers must be
+ * sent before the response body.
+ * <p>
+ * Where possible, set the Content-Length header (with the {@link
jakarta.servlet.ServletResponse#setContentLength}
+ * method), to allow the servlet container to use a persistent connection
to return its response to the client,
+ * improving performance. The content length is automatically set if the
entire response fits inside the response
+ * buffer.
+ * <p>
+ * When using HTTP 1.1 chunked encoding (which means that the response has
a Transfer-Encoding header), do not set
+ * the Content-Length header.
+ * <p>
+ * This method does not need to be either safe or idempotent. Operations
requested through POST can have side
+ * effects for which the user can be held accountable, for example,
updating stored data or buying items online.
+ * <p>
+ * If the HTTP POST request is incorrectly formatted, <code>doPost</code>
returns an HTTP "Bad Request" message.
+ *
+ * @param req an {@link HttpServletRequest} object that contains the
request the client has made of the servlet
+ * @param resp an {@link HttpServletResponse} object that contains the
response the servlet sends to the client
+ *
+ * @exception IOException if an input or output error is detected
when the servlet handles the request
+ * @exception ServletException if the request for the POST could not be
handled
+ *
+ * @see jakarta.servlet.ServletOutputStream
+ * @see jakarta.servlet.ServletResponse#setContentType
+ */
+ protected void doPatch(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
+ String msg = lStrings.getString("http.method_patch_not_supported");
+ sendMethodNotAllowed(req, resp, msg);
+ }
+
+
/**
* Called by the server (via the <code>service</code> method) to allow a
servlet to handle a POST request. The HTTP
* POST method allows the client to send data of unlimited length to the
Web server a single time and is useful when
* posting information such as credit card numbers.
* <p>
- * When overriding this method, read the request data, write the response
headers, get the response's noBodyWriter
+ * When overriding this method, read the request data, write the response
headers, get the response's Writer
* or output stream object, and finally, write the response data. It's
best to include content type and encoding.
* When using a <code>PrintWriter</code> object to return the response,
set the content type before accessing the
* <code>PrintWriter</code> object.
@@ -346,6 +387,7 @@ public abstract class HttpServlet extends GenericServlet {
boolean allowGet = false;
boolean allowHead = false;
+ boolean allowPatch = false;
boolean allowPost = false;
boolean allowPut = false;
boolean allowDelete = false;
@@ -357,6 +399,10 @@ public abstract class HttpServlet extends GenericServlet {
allowHead = true;
break;
}
+ case "doPatch": {
+ allowPatch = true;
+ break;
+ }
case "doPost": {
allowPost = true;
break;
@@ -387,6 +433,11 @@ public abstract class HttpServlet extends GenericServlet {
allow.append(", ");
}
+ if (allowPatch) {
+ allow.append(METHOD_PATCH);
+ allow.append(", ");
+ }
+
if (allowPost) {
allow.append(METHOD_POST);
allow.append(", ");
@@ -574,6 +625,9 @@ public abstract class HttpServlet extends GenericServlet {
} else if (method.equals(METHOD_TRACE)) {
doTrace(req, resp);
+ } else if (method.equals(METHOD_PATCH)) {
+ doPatch(req, resp);
+
} else {
//
// Note that this means NO servlet supports whatever
diff --git a/java/jakarta/servlet/http/LocalStrings.properties
b/java/jakarta/servlet/http/LocalStrings.properties
index f9fbd6c7a0..492548841f 100644
--- a/java/jakarta/servlet/http/LocalStrings.properties
+++ b/java/jakarta/servlet/http/LocalStrings.properties
@@ -26,6 +26,7 @@ err.state.commit=Not permitted once response has been
committed
http.method_delete_not_supported=HTTP method DELETE is not supported by this
URL
http.method_get_not_supported=HTTP method GET is not supported by this URL
http.method_not_implemented=Method [{0}] is not implemented by this Servlet
for this URI
+http.method_patch_not_supported=HTTP method PATCH is not supported by this URL
http.method_post_not_supported=HTTP method POST is not supported by this URL
http.method_put_not_supported=HTTP method PUT is not supported by this URL
http.non_http=Non HTTP request or response
diff --git a/webapps/docs/changelog.xml b/webapps/docs/changelog.xml
index 70ba58b1be..06dabcd930 100644
--- a/webapps/docs/changelog.xml
+++ b/webapps/docs/changelog.xml
@@ -105,6 +105,15 @@
issues do not "pop up" wrt. others).
-->
<section name="Tomcat 11.0.0-M5 (markt)" rtext="in development">
+ <subsection name="Catalina">
+ <changelog>
+ <add>
+ Add a <code>doPatch</code> method to <code>HttpServlet</code> to
provide
+ support for the HTTP <code>PATCH</code> method as defined in RFC 5789.
+ This is one of the changes in the Servlet 6.1 API. (markt)
+ </add>
+ </changelog>
+ </subsection>
</section>
<section name="Tomcat 11.0.0-M4 (markt)" rtext="release in progress">
<subsection name="General">
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