Access to request parameters is forbidden in this context - thymeleaf

I am using Thymeleaf version 3.0.11. I am trying to get the query string and the url together to append another query string and redirect. Here is my code:
<a th:href="#{${#request.requestURL} + ${#request.queryString} + '&sort=subject'}" th:text="#{teach.subject}"></a>
Also tried this:
<a th:href="${#request.requestURL.append('?').append(#request.queryString).append('&').append('&sort=subject')}" th:text="#{teach.subject}"></a>
But it gives me:
Access to request parameters is forbidden in this context. Note some restrictions apply to variable access. For example, direct access to request parameters is forbidden in preprocessing and unescaped expressions, in TEXT template mode, in fragment insertion specifications and in some specific attribute processors.
I have also tried this:
<a th:href="#{${#request.requestURL} + ${param} + '&sort=subject'}" th:text="#{teach.subject}"></a>
And got this:
Access to variable "param" is forbidden in this context. Note some restrictions apply to variable access. For example, direct access to request parameters is forbidden in preprocessing and unescaped expressions, in TEXT template mode, in fragment insertion specifications and in some specific attribute processors.
Why am i not allowed to reach query string in href? I have tried th:with but results are the same. Any help would be appreciated. Thanks.

Related

Jmeter: Dynamic URL encrypted

I'm working on a test plan with Jmeter.
The issue is that I can't retrieve the URL link as he is managed dynamically.
The URL has the following format:
localhost\blablabla?PATHPARAM=qzflh%2FGJHBGDCV%GROPJHVFFFDDFGGCFD%JJYTGVFRTVFGGFF%JUYGBG
I already try to search the value of PATHPARAM in the previous requests to retrieve it using regular expression extractor but I didn't find it.
It seems that this url is generated inside a javascript code but the way to extract it is unknown for me, inside the js code I find the value : var url = actionName + "?" + params ;
Is that any way to catch the content or the var url in Jmeter, else have you any other solution to solve this issue with this dynamic URL.
Many thanks in advance for your help.
I can see 2 possible options:
If you are being redirected to this URL automatically (you might need to play with Redirect Automatically and Follow Redirects boxes in the HTTP Request sampler
If this is the case - you should be able to get it using the following Regular Expression Extractor configuration
If you need to replicate the logic of this param variable calculation - you can attempt to do it using JSR223 PreProcessor which can execute arbitrary JavaScript code

Siesta iOS GET request with url parameters

Is there a way to make a GET request in Siesta, while providing parameter, like http://example.com/api/list.json?myparam=1?
I tried with
myAPI.resource("list.json?myparam=1")
but the question mark gets escaped.
Then I tried with
myAPI.resource("list.json").request(.GET, urlEncoded:["myparam": "1"])
but it always fails with "The network connection was lost.", but all other requests succeed, so the message is wrong.
You are looking for withParam:
myAPI.resource("list.json").withParam("myparam", "1")
The Service.resource(_:) method you are trying to use in your first example specifically avoids interpreting special characters as params (or anything except a path). From the docs:
The path parameter is simply appended to baseURL’s path, and is never interpreted as a URL. Strings such as .., //, ?, and https: have no special meaning; they go directly into the resulting resource’s path, with escaping if necessary.
This is a security feature, meant to prevent user-submitted strings from bleeding into other parts of the URL.
The Resource.request(_:urlEncoded:) method in your second example is for passing parameters in a request body (i.e. with a POST or PUT), not for parameters in the query string.
Note that you can always use Service.resource(absoluteURL:) to construct a URL yourself if you want to bypass Siesta’s URL component isolation and escaping features.

WSO2 ESB URL parsing issue

I am receiving HTTP/SOAP request with some query parameters. Those query parameters are in repeated format as key=value as /q=key1=value1&key2=value2 etc...
I would like to retrieve all the keys from above URL and check if they are valid or not.
1. Is there any way to define global array which can hold these keys
2. How to validate if keys are present or not. Does ESB supports java "contains" API ?
I believe you are doing a GET request..
You can retrieve all the query parameters in a sequence.
eg:
For a request url; http:// localhost:8280/getSimpleQuote?symbol=IBM
<property name="symbol" expression="$url:symbol"/> will return the symbol 'IBM'.
After getting all keys, you can validate them
you can get the query parameters with the xpath expression get-property{'uri.var.xxx'} with xxx is the name of the query parameter you need to get.
When a resource is defined with a URL mapping, only those requests that match the given URL mapping will be processed by the resource. Alternatively one could configure a resource with a URI template. A URI template represents a class of URIs using patterns and variables. Some examples of valid URI templates are given below.
/order/{orderId}
/dictionary/{char}/{word}
All the identifiers within curly braces are considered variables. A URL that matches the template “/order/{orderId}” is given below.
/order/A0001
In the above URL instance, the variable orderId has been assigned the value “A0001”. Similarly following URL adheres to the template “/dictionary/{char}/{word}”.
/dictionary/c/cat
In this case the variable “char” has the value “c” and the variable “word” is given the value “cat”. When a resource is associated with a URI template, all requests that match the template will be processed by the resource. At the same time ESB will provide access to the exact values of the template variables through message context properties. For an example assume a resource configured with the URI template “/dictionary/{char}/{word}”. If the request “/dictionary/c/cat” is sent to the ESB, it will be dispatched to the above resource and we will be able to retrieve the exact values of the two variables using the get-property XPath extension of WSO2 ESB:

Is a url query parameter valid if it has no value?

Is a url like http://example.com/foo?bar valid?
I'm looking for a link to something official that says one way or the other. A simple yes/no answer or anecdotal evidence won't cut it.
Valid to the URI RFC
Likely acceptable to your server-side framework/code
The URI RFC doesn't mandate a format for the query string. Although it is recognized that the query string will often carry name-value pairs, it is not required to (e.g. it will often contain another URI).
3.4. Query
The query component contains non-hierarchical data that, along with
data in the path component (Section 3.3), serves to identify a
resource within the scope of the URI's scheme and naming authority
(if any). ...
... However, as query components
are often used to carry identifying information in the form of
"key=value" pairs and one frequently used value is a reference to
another URI, ...
HTML establishes that a form submitted via HTTP GET should encode the form values as name-value pairs in the form "?key1=value1&key2=value2..." (properly encoded). Parsing of the query string is up to the server-side code (e.g. Java servlet engine).
You don't identify what server-side framework you use, if any, but it is possible that your server-side framework may assume the query string will always be in name-value pairs and it may choke on a query string that is not in that format (e.g. ?bar). If its your own custom code parsing the query string, you simply have to ensure you handle that query string format. If its a framework, you'll need to consult your documentation or simply test it to see how it is handled.
They're perfectly valid. You could consider them to be the equivalent of the big muscled guy standing silently behind the mob messenger. The guy doesn't have a name and doesn't speak, but his mere presence conveys information.
"The "http" scheme is used to locate network resources via the HTTP protocol. This section defines the scheme-specific syntax and semantics for http URLs." http://www.w3.org/Protocols/rfc2616/rfc2616.html
http_URL = "http:" "//" host [ ":" port ] [ abs_path [ "?" query ]]
So yes, anything is valid after a question mark. Your server may interpret differently, but anecdotally, you can see some languages treat that as a boolean value which is true if listed.
Yes, it is valid.
If one simply want to check if the parameter exists or not, this is one way to do so.
URI Spec
The only relevant part of the URI spec is to know everything between the first ? and the first # fits the spec's definition of a query. It can include any characters such as [:/.?]. This means that a query string such as ?bar, or ?ten+green+apples is valid.
Find the RFC 3986 here
HTML Spec
isindex is not meaningfully HTML5.
It's provided deprecated for use as the first element in a form only, and submits without a name.
If the entry's name is "isindex", its type is "text", and this is the first entry in the form data set, then append the value to result and skip the rest of the substeps for this entry, moving on to the next entry, if any, or the next step in the overall algorithm otherwise.
The isindex flag is for legacy use only. Forms in conforming HTML documents will not generate payloads that need to be decoded with this flag set.
The last time isindex was supported was HTML3. It's use in HTML5 is to provide easier backwards compatibility.
Support in libraries
Support in libraries for this format of URI varies however some libraries do provide legacy support to ease use of isindex.
Perl URI.pm (special support)
Some libraries like Perl's URI provide methods of parsing these kind of structures
$uri->query_keywords
$uri->query_keywords( $keywords, ... )
$uri->query_keywords( \#keywords )
Sets and returns query components that use the keywords separated by "+" format.
Node.js url (no special support)
As another far more frequent example, node.js takes the normal route and eases parsing as either
A string
or, an object of keys and values (using parseQueryString)
Most other URI-parsing APIs following something similar to this.
PHP parse_url, follows as similar implementation but only returns the string for the query. Parsing into an object of k=>v requires parse_string()
It is valid: see Wikipedia, RFC 1738 (3.3. HTTP), RFC 3986 (3. Syntax Components).
isindex deprecated magic name from HTML5
This deprecated feature allows a form submission to generate such an URL, providing further evidence that it is valid for HTML. E.g.:
<form action="#isindex" class="border" id="isindex" method="get">
<input type="text" name="isindex" value="bar"/>
<button type="submit">Submit</button>
</form>
generates an URL of type:
?bar
Standard: https://www.w3.org/TR/html5/forms.html#naming-form-controls:-the-name-attribute
isindex is however deprecated as mentioned at: https://stackoverflow.com/a/41689431/895245
As all other answers described, it's perfectly valid for checking, specially for boolean kind stuff
Here is a simple function to get the query string by name:
function getParameterByName(name, url) {
if (!url) {
url = window.location.href;
}
name = name.replace(/[\[\]]/g, "\\$&");
var regex = new RegExp("[?&]" + name + "(=([^&#]*)|&|#|$)"),
results = regex.exec(url);
if (!results) return null;
if (!results[2]) return '';
return decodeURIComponent(results[2].replace(/\+/g, " "));
}
and now you want to check if the query string you are looking for exists or not, you may do a simple thing like:
var exampleQueryString = (getParameterByName('exampleQueryString') != null);
the exampleQueryString will be false if the function can't find the query string, otherwise will be true.
The correct resource to look for this is RFC6570. Please refer to section 3.2.9 where in examples empty parameter is presented as below.
Example Template Expansion
{&x,y,empty} &x=1024&y=768&empty=

How do I get the URL returned using ColdFusion

I am accessing a set of websites using variables
<cfhttp url="http://website.com/index.php?title=#var1#:#var2#&action=edit##EditPage" method="GET">
Some pages do not provide the data I need and instead of #EditPage in the URL show a fragment
edit&redlink=1. I want to treat these pages differently. How do I go about identifying them?
The hash "#" used in URL is used by browsers and not servers. Typically when a browser sees the hash in the URL it will jump to either an anchor on the page with the same name, or an element with that id. Exceptions, are when javascript is used to modify the page dynamically based on the hash.
If I'm understanding you correctly, what you want to do is construct the URL in a separate variable first. Something like URLtoGet. Then, you can use cfif to switch on whether that constructed URL contains the fragment you specified. Look into contains(), find(), and findNoCase() to determine which is the best option for you.

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