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Upgrade cros_image_to_target.py to support Omaha v3 protocol.
As part of the efforts to support HTTP-based downloads for autoupdate, we are upgrading update_engine from Omaha v2 to v3. So, we need to update cros_image_to_target.py to also understand the v3 XML. BUG=chromium-os:35930 TEST=Successfully updated my ZGB which was running the v3 update_engine. Change-Id: I2b4831c1e87ccf064e79cd6d34205f19aedc9d57 Reviewed-on: https://gerrit.chromium.org/gerrit/37065 Reviewed-by: Chris Sosa <sosa@chromium.org> Reviewed-by: Paul Stewart <pstew@chromium.org> Commit-Ready: Chris Sosa <sosa@chromium.org> Tested-by: Chris Sosa <sosa@chromium.org>
This commit is contained in:
Jay Srinivasan
Gerrit
parent
bd9212c1ce
commit
b797d74253
@ -39,6 +39,42 @@ STATEFUL_FILENAME = 'stateful.tgz'
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# How long do we wait for the server to start before launching client
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SERVER_STARTUP_WAIT = 1
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UPDATE_RESPONSE = """<?xml version="1.0" encoding="UTF-8"?>
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<response protocol="3.0">
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<daystart elapsed_seconds="%(time_elapsed)s"/>
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<app appid="{%(appid)s}" status="ok">
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<ping status="ok"/>
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<updatecheck status="ok">
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<urls>
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<url codebase="%(codebase)s/"/>
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</urls>
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<manifest version="9999.0.0">
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<packages>
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<package hash="%(sha1)s" name="%(filename)s" size="%(size)s"
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required="true"/>
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</packages>
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<actions>
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<action event="postinstall"
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ChromeOSVersion="9999.0.0"
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sha256="%(sha256)s"
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needsadmin="false"
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IsDelta="%(is_delta_format)s"
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%(extra_attr)s />
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</actions>
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</manifest>
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</updatecheck>
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</app>
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</response>
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"""
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NO_UPDATE_RESPONSE = """<?xml version="1.0" encoding="UTF-8"?>
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<response" protocol="3.0">
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<daystart elapsed_seconds="%(time_elapsed)s"/>
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<app appid="{%(appid)s}" status="ok">
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<ping status="ok"/>
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<updatecheck status="noupdate"/>
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</app>
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</response>
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"""
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class Command(object):
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"""Shell command ease-ups for Python."""
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@ -449,34 +485,6 @@ class StringUpdateResponse(UpdateResponse):
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class PingUpdateResponse(StringUpdateResponse):
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"""Respond to a client ping with pre-fab XML response."""
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app_id = '87efface-864d-49a5-9bb3-4b050a7c227a'
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xmlns = 'http://www.google.com/update2/response'
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payload_success_template = """<?xml version="1.0" encoding="UTF-8"?>
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<gupdate xmlns="%s" protocol="2.0">
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<daystart elapsed_seconds="%s"/>
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<app appid="{%s}" status="ok">
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<ping status="ok"/>
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<updatecheck
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codebase="%s"
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hash="%s"
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sha256="%s"
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IsDelta="true"
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needsadmin="false"
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size="%s"
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status="ok"/>
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</app>
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</gupdate>
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"""
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payload_failure_template = """<?xml version="1.0" encoding="UTF-8"?>
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<gupdate xmlns="%s" protocol="2.0">
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<daystart elapsed_seconds="%s"/>
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<app appid="{%s}" status="ok">
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<ping status="ok"/>
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<updatecheck status="noupdate"/>
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</app>
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</gupdate>
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"""
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def __init__(self):
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self.content_type = 'text/xml'
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@ -486,25 +494,90 @@ class PingUpdateResponse(StringUpdateResponse):
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PingUpdateResponse.file_sha256 = filesha256
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PingUpdateResponse.file_size = filesize
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def GetCommonResponseValues(self):
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"""Returns a dictionary of default values that'll be substituted in the
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response irrespective of the protocol version."""
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response_values = {}
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response_values['appid'] = '87efface-864d-49a5-9bb3-4b050a7c227a'
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response_values['time_elapsed'] = self.SecondsSinceMidnight()
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return response_values
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def GetSubstitutedResponse(self, response_template, response_values):
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"""Substitutes the response template with response_values.
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Args:
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response_dict: Canned response template
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response_values: Values to be substituted in the canned template.
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Returns:
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Xml string to be passed back to client.
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Raises:
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AutoupdateError if required response values are not present.
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"""
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try:
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response_xml = response_template % response_values
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return response_xml
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except KeyError as e:
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self.Fatal('Missing response value: %s' % e)
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def GetUpdateResponse(self, sha1, sha256, size, url, is_delta_format):
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"""Returns a response to the client corresponding to a new update.
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Args:
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sha1: SHA1 hash of update blob
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sha256: SHA256 hash of update blob
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size: size of update blob
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url: where to find update blob
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is_delta_format: true if url refers to a delta payload
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Returns:
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Xml string to be passed back to client.
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"""
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response_values = self.GetCommonResponseValues()
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response_values['sha1'] = sha1
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response_values['sha256'] = sha256
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response_values['size'] = size
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response_values['url'] = url
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(codebase, filename) = os.path.split(url)
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response_values['codebase'] = codebase
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response_values['filename'] = filename
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response_values['is_delta_format'] = is_delta_format
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response_values['extra_attr'] = ''
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response_xml = self.GetSubstitutedResponse(UPDATE_RESPONSE,
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response_values)
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return response_xml
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def GetNoUpdateResponse(self):
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"""Returns a response to the client corresponding to no update."""
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response_values = self.GetCommonResponseValues()
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response_xml = self.GetSubstitutedResponse(NO_UPDATE_RESPONSE,
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response_values)
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return response_xml
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def Reply(self, handler, send_content=True, post_data=None):
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"""Return (using StringResponse) an XML reply to ForcedUpdate clients."""
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if not post_data:
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return UpdateResponse.Reply(self, handler)
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request_version = (minidom.parseString(post_data).firstChild.
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getElementsByTagName('o:app')[0].
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getAttribute('version'))
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root = minidom.parseString(post_data)
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protocol = root.firstChild.getAttribute('protocol')
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if (protocol != '3.0'):
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raise BaseException('You first need to update your device to a build '
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'that uses Omaha v3 protocol for the update_engine.')
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app = root.firstChild.getElementsByTagName('app')[0]
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request_version = app.getAttribute('version')
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if request_version == 'ForcedUpdate':
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host, pdict = cgi.parse_header(handler.headers.getheader('Host'))
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self.string = (self.payload_success_template %
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(self.xmlns, self.SecondsSinceMidnight(),
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self.app_id, 'http://%s/%s' % (host, UPDATE_FILENAME),
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self.file_hash, self.file_sha256, self.file_size))
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url = 'http://%s/%s' % (host, UPDATE_FILENAME)
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self.string = self.GetUpdateResponse(self.file_hash,
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self.file_sha256,
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self.file_size,
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url,
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False) # is_delta_format
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else:
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self.string = (self.payload_failure_template %
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(self.xmlns, self.SecondsSinceMidnight(), self.app_id))
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self.string = (self.GetNoUpdateResponse())
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StringUpdateResponse.Reply(self, handler, send_content)
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