view tests/test-hgweb-no-request-uri.t @ 26755:bb0b955d050d

streamclone: support for producing and consuming stream clone bundles

Up to this point, stream clones only existed as a dynamically generated
data format produced and consumed during streaming clones. In order to
support this efficient cloning format with the clone bundles feature, we
need a more formal, on disk representation of the streaming clone data.

This patch introduces a new "bundle" type for streaming clones. Unlike
existing bundles, it does not contain changegroup data. It does,
however, share the same concepts like the 4 byte header which identifies
the type of data that follows and the 2 byte abbreviation for
compression types (of which only "UN" is currently supported).

The new bundle format is essentially the existing stream clone version 1
data format with some headers at the beginning.

Content negotiation at stream clone request time checked for repository
format/requirements compatibility before initiating a stream clone. We
can't do active content negotiation when using clone bundles. So, we put
this set of requirements inside the payload so consumers have a built-in
mechanism for checking compatibility before reading and applying lots of
data. Of course, we will also advertise this requirements set in clone
bundles. But that's for another patch.

We currently don't have a mechanism to produce and consume this new
bundle format. This will be implemented in upcoming patches.

It's worth noting that if a legacy client attempts to `hg unbundle` a
stream clone bundle (with the "HGS1" header), it will abort with:
"unknown bundle version S1," which seems appropriate.

This tests if hgweb and hgwebdir still work if the REQUEST_URI variable is
no longer passed with the request. Instead, SCRIPT_NAME and PATH_INFO
should be used from d74fc8dec2b4 onward to route the request.

  $ hg init repo
  $ cd repo
  $ echo foo > bar
  $ hg add bar
  $ hg commit -m "test"
  $ hg tip
  changeset:   0:61c9426e69fe
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     test
  
  $ cat > request.py <<EOF
  > from mercurial.hgweb import hgweb, hgwebdir
  > from StringIO import StringIO
  > import os, sys
  > 
  > errors = StringIO()
  > input = StringIO()
  > 
  > def startrsp(status, headers):
  >     print '---- STATUS'
  >     print status
  >     print '---- HEADERS'
  >     print [i for i in headers if i[0] != 'ETag']
  >     print '---- DATA'
  >     return output.write
  > 
  > env = {
  >     'wsgi.version': (1, 0),
  >     'wsgi.url_scheme': 'http',
  >     'wsgi.errors': errors,
  >     'wsgi.input': input,
  >     'wsgi.multithread': False,
  >     'wsgi.multiprocess': False,
  >     'wsgi.run_once': False,
  >     'REQUEST_METHOD': 'GET',
  >     'SCRIPT_NAME': '',
  >     'SERVER_NAME': '127.0.0.1',
  >     'SERVER_PORT': os.environ['HGPORT'],
  >     'SERVER_PROTOCOL': 'HTTP/1.0'
  > }
  > 
  > def process(app):
  >     content = app(env, startrsp)
  >     sys.stdout.write(output.getvalue())
  >     sys.stdout.write(''.join(content))
  >     getattr(content, 'close', lambda : None)()
  >     print '---- ERRORS'
  >     print errors.getvalue()
  > 
  > output = StringIO()
  > env['PATH_INFO'] = '/'
  > env['QUERY_STRING'] = 'style=atom'
  > process(hgweb('.', name = 'repo'))
  > 
  > output = StringIO()
  > env['PATH_INFO'] = '/file/tip/'
  > env['QUERY_STRING'] = 'style=raw'
  > process(hgweb('.', name = 'repo'))
  > 
  > output = StringIO()
  > env['PATH_INFO'] = '/'
  > env['QUERY_STRING'] = 'style=raw'
  > process(hgwebdir({'repo': '.'}))
  > 
  > output = StringIO()
  > env['PATH_INFO'] = '/repo/file/tip/'
  > env['QUERY_STRING'] = 'style=raw'
  > process(hgwebdir({'repo': '.'}))
  > EOF
  $ python request.py
  ---- STATUS
  200 Script output follows
  ---- HEADERS
  [('Content-Type', 'application/atom+xml; charset=ascii')]
  ---- DATA
  <?xml version="1.0" encoding="ascii"?>
  <feed xmlns="http://www.w3.org/2005/Atom">
   <!-- Changelog -->
   <id>http://127.0.0.1:$HGPORT/</id>
   <link rel="self" href="http://127.0.0.1:$HGPORT/atom-log"/>
   <link rel="alternate" href="http://127.0.0.1:$HGPORT/"/>
   <title>repo Changelog</title>
   <updated>1970-01-01T00:00:00+00:00</updated>
  
   <entry>
    <title>[default] test</title>
    <id>http://127.0.0.1:$HGPORT/#changeset-61c9426e69fef294feed5e2bbfc97d39944a5b1c</id>
    <link href="http://127.0.0.1:$HGPORT/rev/61c9426e69fe"/>
    <author>
     <name>test</name>
     <email>&#116;&#101;&#115;&#116;</email>
    </author>
    <updated>1970-01-01T00:00:00+00:00</updated>
    <published>1970-01-01T00:00:00+00:00</published>
    <content type="xhtml">
  	<table xmlns="http://www.w3.org/1999/xhtml">
  	<tr>
  		<th style="text-align:left;">changeset</th>
  		<td>61c9426e69fe</td>
                </tr>
                <tr>
                                <th style="text-align:left;">branch</th>
                                <td>default</td>
                </tr>
                <tr>
                                <th style="text-align:left;">bookmark</th>
  		<td></td>
  	</tr>
  	<tr>
  		<th style="text-align:left;">tag</th>
  		<td>tip</td>
  	</tr>
  	<tr>
  		<th style="text-align:left;">user</th>
  		<td>&#116;&#101;&#115;&#116;</td>
  	</tr>
  	<tr>
  		<th style="text-align:left;vertical-align:top;">description</th>
  		<td>test</td>
  	</tr>
  	<tr>
  		<th style="text-align:left;vertical-align:top;">files</th>
  		<td>bar<br /></td>
  	</tr>
  	</table>
    </content>
   </entry>
  
  </feed>
  ---- ERRORS
  
  ---- STATUS
  200 Script output follows
  ---- HEADERS
  [('Content-Type', 'text/plain; charset=ascii')]
  ---- DATA
  
  -rw-r--r-- 4 bar
  
  
  ---- ERRORS
  
  ---- STATUS
  200 Script output follows
  ---- HEADERS
  [('Content-Type', 'text/plain; charset=ascii')]
  ---- DATA
  
  /repo/
  
  ---- ERRORS
  
  ---- STATUS
  200 Script output follows
  ---- HEADERS
  [('Content-Type', 'text/plain; charset=ascii')]
  ---- DATA
  
  -rw-r--r-- 4 bar
  
  
  ---- ERRORS
  

  $ cd ..