Processing an upoaded file within trac for a plugin use

Question

4.00/5 (1 vote)

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I'm trying to write a plugin for trac.edgewall.org but I'm missing sthg. after reading all the tutorials made by the site trac.edgewall.org.
So I'm trying to upload a file to the sever using the POST method this a simplified example :

XML

<form id="MyForm" name="input" action="" method="post">
<label for="attachment">URL :</label>
<input type="file" name="GanttFile" value=""/>
</form>

Now I'm trying to process the uploaded file ,read it and do some modifications than save it or ask the user to choose where he wants to save the file (export some data from the trac database)...I'm still blocked at this level :

PHP

def process_request(self, req):
    data = {}
    if req.method=='POST':
        file=req.args.get('GanttFile', 'value')
        # and now I'm blocked !! how can I modify this file
        # and then redirect or save it !

and if I try to display the content of the variable **file** I just get the name of the file not all the path ?
By doing something like this :

XML

<input type="text" name="file" value ="$file" />

and in my source code :

PHP

def process_request(self, req):
    data = {}
    if req.method=='POST':
        file=req.args.get('GanttFile', 'value')
        # display the content
        data.update({
            'file': file
        })

Any idea or ideas ?
Thanks

Posted 17-Sep-12 20:34pm

afatnassi

Updated 18-Sep-12 22:57pm

v3

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afatnassi · Accepted Answer · 2012-09-18T03:50:00

Solution 1

Actually the code above is working .
The problem was the use of Firefox ...the command

file=req.args.get('GanttFile', 'value')

In firefox : just the name of the file
In IE: the absolute path.

Is there a manner to make this works for the two browsers ?
Thanks

Posted 18-Sep-12 3:50am

afatnassi

Updated 18-Sep-12 22:58pm

v2

afatnassi · Accepted Answer · 2012-09-19T02:53:00

So I'm putting my code here for those who wants to reuse it or for better suggestions :

The Python class :

class ProjectPlugin(Component):
    implements(INavigationContributor, IRequestHandler, ITemplateProvider)

    # INavigationContributor methods
    def get_active_navigation_item(self, req):
        return 'helloworldv2linkIdentifier'

    def get_navigation_items(self, req):
        yield ('mainnav', 'helloworldv2linkIdentifier',
               tag.a('Gantt Export', href=req.href.myapppp()))


    # IRequestHandler methods
    def match_request(self, req):
        return re.match(r'/myapppp(?:_trac)?(?:/.*)?$', req.path_info)

    def process_request(self, req):
    # add the implements and chek the imports ! and the indents

        data = {}
        if req.method=='POST':
            if 'DispFile' in req.args:
                myFile=req.args.get('Fily','value')
                data.update({
                    'myFile': myFile
                })
                dummy=req.args.get('Fily','value').filename
                data.update({
                        'dummy': dummy
                    })
                # file  reading
                mystream = myFile.file.read()


        # This tuple is for Genshi (template_name, data, content_type)
        # Without data the trac layout will not appear.
        return 'GanttTemplate.html', data, None

    # ITemplateProvider methods
    # Used to add the plugin's templates and htdocs
    def get_templates_dirs(self):
        from pkg_resources import resource_filename
        return [resource_filename(__name__, 'templates')]

    def get_htdocs_dirs(self):
        return []

The GanttTemplate.html file :

HTML

<!DOCTYPE html
    PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
      xmlns:py="http://genshi.edgewall.org/"
      xmlns:xi="http://www.w3.org/2001/XInclude">
  <xi:include href="layout.html" />
 
  <head>
    <title>Gant Export Tool</title>
  </head>

  <body> 
   
 
    <form id="GanttForm1" name="inputForm2" action="" method="POST" enctype="multipart/form-data">       
        <fieldset id="operations" >
            <legend >
                Configuration
            </legend>
           
            <label for="Fily">URL :</label>           
            <input type="file" name="Fily" value=""/><br /><br />
            Dummy variable = $dummy            <br/>
            <input type="submit" name="DispFile" value="Display the file"/><br /><br />
        </fieldset>
    </form>
    <br /><br /><br /><br /><br />
  </body>
</html>