GitHub user squarebracket opened a pull request:
https://github.com/apache/jmeter/pull/261
Clear querystring args on each call to setPath
I use the `HTTPSamplerBase` class as a base class for an HTTP sampler
class. I recently found a bug with the way handling of query strings is
implemented. Specifically, each call to `setPath()` on the sampler adds the
query string arguments to the current set of query string arguments. That means
calling `setPath()` multiple times accumulates all the query string arguments.
From the source code:
```java
//
src/protocol/http/org/apache/jmeter/protocol/http/sampler/HTTPSamplerBase.java:453
public void setPath(String path, String contentEncoding) {
boolean fullUrl = path.startsWith(HTTP_PREFIX) ||
path.startsWith(HTTPS_PREFIX);
boolean getOrDelete = HTTPConstants.GET.equals(getMethod()) ||
HTTPConstants.DELETE.equals(getMethod());
if (!fullUrl && getOrDelete) {
int index = path.indexOf(QRY_PFX);
if (index > -1) {
setProperty(PATH, path.substring(0, index));
// Parse the arguments in querystring, assuming specified
encoding for values
parseArguments(path.substring(index + 1), contentEncoding);
} else {
setProperty(PATH, path);
}
} else {
setProperty(PATH, path);
}
}
```
As you can see, if there's a query string, it calls {{parseArguments}} to
set the query string. That function just adds every argument to the sampler's
arguments, whether it exists or not:
```java
//
src/protocol/http/org/apache/jmeter/protocol/http/sampler/HTTPSamplerBase.java:1090
public void parseArguments(String queryString, String contentEncoding) {
String[] args = JOrphanUtils.split(queryString, QRY_SEP);
final boolean isDebug = log.isDebugEnabled();
for (String arg : args) {
if (isDebug) {
log.debug("Arg: " + arg);
}
// need to handle four cases:
// - string contains name=value
// - string contains name=
// - string contains name
// - empty string
String metaData; // records the existence of an equal sign
String name;
String value;
int length = arg.length();
int endOfNameIndex = arg.indexOf(ARG_VAL_SEP);
if (endOfNameIndex != -1) {// is there a separator?
// case of name=value, name=
metaData = ARG_VAL_SEP;
name = arg.substring(0, endOfNameIndex);
value = arg.substring(endOfNameIndex + 1, length);
} else {
metaData = "";
name = arg;
value = "";
}
if (name.length() > 0) {
if (isDebug) {
log.debug("Name: " + name + " Value: " + value + "
Metadata: " + metaData);
}
// If we know the encoding, we can decode the argument
value,
// to make it easier to read for the user
if (!StringUtils.isEmpty(contentEncoding)) {
addEncodedArgument(name, value, metaData,
contentEncoding);
} else {
// If we do not know the encoding, we just use the
encoded value
// The browser has already done the encoding, so save
the values as is
addNonEncodedArgument(name, value, metaData);
}
}
}
}
```
My solution is very simple -- just clear the arguments before the call to
`parseArguments`:
```java
//
src/protocol/http/org/apache/jmeter/protocol/http/sampler/HTTPSamplerBase.java:453
public void setPath(String path, String contentEncoding) {
boolean fullUrl = path.startsWith(HTTP_PREFIX) ||
path.startsWith(HTTPS_PREFIX);
boolean getOrDelete = HTTPConstants.GET.equals(getMethod()) ||
HTTPConstants.DELETE.equals(getMethod());
if (!fullUrl && getOrDelete) {
int index = path.indexOf(QRY_PFX);
if (index > -1) {
setProperty(PATH, path.substring(0, index));
// Zero out the arguments, so we don't include query
strings from previous calls
getArguments().clear();
// Parse the arguments in querystring, assuming specified
encoding for values
parseArguments(path.substring(index + 1), contentEncoding);
} else {
setProperty(PATH, path);
}
} else {
setProperty(PATH, path);
}
}
```
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/squarebracket/jmeter fix-httpsamplerbase
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/jmeter/pull/261.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #261
----
commit ca84f7faac6df4ee73259c5b8ba22676f9361895
Author: Chuck Wilson <charles.wil...@vantrix.com>
Date: 2017-02-01T21:36:06Z
Clear querystring args on each call to setPath()
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