我正在發佈一個小樣本,其中詳細說明了您在問什麼:如何使用App Engine服務帳戶憑據訪問Google雲端存儲(特別是列出格式化的Google雲端存儲存儲區) 。如果可用,這將是https://code.google.com/p/google-api-python-client/回購的一部分,但在此之前,這裏是代碼:
import httplib2
import logging
import os
import pickle
import re
from google.appengine.api import memcache
from google.appengine.ext import webapp
from google.appengine.ext.webapp import template
from google.appengine.ext.webapp.util import run_wsgi_app
from oauth2client.appengine import AppAssertionCredentials
# Constants for the XSL stylesheet and the Google Cloud Storage URI.
XSL = '\n<?xml-stylesheet href="/listing.xsl" type="text/xsl"?>\n';
URI = 'http://commondatastorage.googleapis.com'
# Obtain service account credentials and authorize HTTP connection.
credentials = AppAssertionCredentials(
scope='https://www.googleapis.com/auth/devstorage.read_write')
http = credentials.authorize(httplib2.Http(memcache))
class MainHandler(webapp.RequestHandler):
def get(self):
try:
# Derive desired bucket name from path after domain name.
bucket = self.request.path
if bucket[-1] == '/':
# Trim final slash, if necessary.
bucket = bucket[:-1]
# Send HTTP request to Google Cloud Storage to obtain bucket listing.
resp, content = http.request(URI + bucket, "GET")
if resp.status != 200:
# If error getting bucket listing, raise exception.
err = 'Error: ' + str(resp.status) + ', bucket: ' + bucket + \
', response: ' + str(content)
raise Exception(err)
# Edit returned bucket listing XML to insert style sheet for nice
# formatting and send results to client.
content = re.sub('(<ListBucketResult)', XSL + '\\1', content)
self.response.headers['Content-Type'] = 'text/xml'
self.response.out.write(content)
except Exception as e:
self.response.set_status(404)
self.response.out.write(str(e))
def main():
application = webapp.WSGIApplication(
[
('.*', MainHandler),
],
debug=True)
run_wsgi_app(application)
if __name__ == '__main__':
main()
此代碼取決於XSLT樣式表。您可以註釋掉引用XSL來消除依賴或包括在您的項目中的以下文件(名稱listing.xsl):
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:ama="http://doc.s3.amazonaws.com/2006-03-01">
<xsl:template match="/">
<html>
<body>
<h2><a href="http://developer.google.com/storage">Google Cloud Storage</a> Con
tent Listing for Bucket
<xsl:value-of select="ama:ListBucketResult/ama:Name"/></h2>
<table border="1" cellpadding="5">
<tr bgcolor="#9acd32">
<th>Object Name</th>
<th>Modification Time</th>
<th>ETag</th>
<th>Size</th>
<th>Storage Class</th>
</tr>
<xsl:for-each select="ama:ListBucketResult/ama:Contents">
<tr>
<td><xsl:value-of select="ama:Key"/></td>
<td><xsl:value-of select="ama:LastModified"/></td>
<td><xsl:value-of select="ama:ETag"/></td>
<td><xsl:value-of select="ama:Size"/></td>
<td><xsl:value-of select="ama:StorageClass"/></td>
</tr>
</xsl:for-each>
</table>
</body>
</html>
</xsl:template>
</xsl:stylesheet>
當App Engine已經有一個內置API用於直接訪問雲存儲時,爲什麼要使用restful API? – 2012-03-22 12:15:35
內置API不會讓我列出存儲桶的內容。 – Yasser 2012-03-22 13:40:01