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perl dancer route template hashref pass complex json file to server issue

by RamiD (Acolyte)
on Jul 25, 2016 at 20:11 UTC ( #1168504=perlquestion: print w/replies, xml ) Need Help??

RamiD has asked for the wisdom of the Perl Monks concerning the following question:

Hi , I have a problem with perl dancer post parameter to server with template hashref way, the param is json object, if the json object is simple , it work fine mean that perl subroutine template hashref send the json param obj as it should but if I have more complex json file eg. {"name":"jsonFileexample","problem":"thisIsThrProblem\"withComma"} if this is the json file with comma inside one of the json file param , perl hash ref delete the \ from the file , it will look like this {"name":"jsonFileexample","problem":"thisIsThrProblem"withComma"} which will be not a valid json file , how can I send paran (json file) from perl dancer route template param to server as is , without perl changing my json file !!
  • Comment on perl dancer route template hashref pass complex json file to server issue

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Re: perl dancer route template hashref pass complex json file to server issue
by stevieb (Canon) on Jul 25, 2016 at 21:01 UTC

    Your post, as is, is very hard to read (its one big blob of text).

    Please separate your paragraphs with <p></p> tags, and put your code within <code></code> tags to space it out a bit, and make it digestable (and the code/JSON copy/pastable).

Re: perl dancer route template hashref pass complex json file to server issue
by Anonymous Monk on Jul 25, 2016 at 22:38 UTC

    Hi,

    Which version of Dancer?

    Can you prove it? Can you post a short code example which demonstrates this bug?

      I don't see the claimed problem, it all works as it should
      >> Dancer 1.3202 server 2120 listenin >> Dancer::Plugin::EscapeHTML (0.22) http://localhost:3000/?jj={%22name%22:%22jsonFileexample%22,%22problem +%22:%22thisIsThrProblem\%22withComma%22};oj=jjjj
      {
        jj => "{\"name\":\"jsonFileexample\",\"problem\":\"thisIsThrProblem\\\"withComma\"}",
        oj => "jjjj",
      }

      use Dancer; use Data::Dump qw/ pp /; use Dancer::Plugin::EscapeHTML; any '/' => sub { "<pre>".escape_html( pp( scalar params() ) )."</pre>";;;; }; dance;
      Hi , I will explain more with code example in my perl dancer code I have route
      use Dancer ':syntax'; our $VERSION = '0.1'; get '/PopUp' => sub { my $jsonFile={jj =>"{"name":"jsonFileexample","problem":"thisIsThrProb +lem\"withComma"}"} template 'PopUp' ,{'sendfileToserver'=>$jsonFile}; };
      in the server side I have the route that receive the perl dancer paramemters
      <script> var customjsonList ="<%customCommands%>"; alert(customjsonList.children.length) var output=customjsonList .split(","); alert(output) </script>
      so here in javascript I had the error , that some thing is wrong with the json file when I look at the error I saw that json file is missing the \
      {"name":"jsonFileexample","problem":"thisIsThrProblem"withComma"}" }
      I have perl dancer "Dancer 1.3202" thanks Rami D.

        Hi , I will explain more with code example in my perl dancer code I have route ... $jsonFile ...

        Sorry, that doesn't compile , its not perl

        $ perl nope Bareword found where operator expected at nope line 5, near ""{"name" (Missing operator before name?) String found where operator expected at nope line 5, near "name":"" Bareword found where operator expected at nope line 5, near "":"jsonFi +leexample" (Missing operator before jsonFileexample?) String found where operator expected at nope line 5, near "jsonFileexa +mple","" Bareword found where operator expected at nope line 5, near "","proble +m" (Missing operator before problem?) String found where operator expected at nope line 5, near "problem":"" Bareword found where operator expected at nope line 5, near "":"thisIs +ThrProblem" (Missing operator before thisIsThrProblem?) Backslash found where operator expected at nope line 5, near "thisIsTh +rProblem\" String found where operator expected at nope line 5, at end of line (Missing semicolon on previous line?) syntax error at nope line 5, near ""{"name" Can't find string terminator '"' anywhere before EOF at nope line 5.

        in the server side I have the route that receive the perl dancer paramemters

        That doesn't mention sendfileToserver

        so here in javascript I had the error , that some thing is wrong with the json file when I look at the error I saw that json file is missing the \

        So far you're not showing a problem with Dancer

        Most likely a problem in your template

        Use a JSON library to generate JSON values (we almost always use JSON::XS). Generating a JSON value by hand is error prone, especially when you don't know how escape characters work in quotes in the language you are writing in.

        #!/usr/bin/perl -l print qq<{"name":"jsonFileexample","problem":"thisIsThrProblem\"withCo +mma"}>;

        for example, produces:

        {"name":"jsonFileexample","problem":"thisIsThrProblem"withComma"}

        - tye        

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