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我仔细阅读了谷歌通讯API文档，但我无法获得正确的PUT请求（即更新）。我正在使用Ruby on Rails 3.2和OAuth gem（v0.4.5）。我取得与Omniauth令牌和范围定义为“https://www.google.com/m8/feeds”谷歌联系人API：未经授权的401未知授权标头
让我证明：
ruby-1.9.2-p290 :001 > @access_token.get("https://www.google.com/m8/feeds/contacts/default/full/c1f86b48b52548c", {"GData-Version" => "3.0"})
=> #<Net::HTTPOK 200 OK readbody=true>
正如你可以看到，GET请求很好的工作，所以我的OAuth访问令牌应该是好的。删除请求的工作也是：
ruby-1.9.2-p290 :002 > @access_token.delete('https://www.google.com/m8/feeds/contacts/default/full/c1f86b48b52548c', { 'GData-Version' => '3.0', 'If-Match' => '"RH46fTVSLyt7I2A9Wx9VFkgMQAU."' })
=> #<Net::HTTPOK 200 OK readbody=true>
到目前为止，这么好。在这里，我按照Google的文档[1]的说明在请求标题中提供了联系人条目的Etag。所以它不应该造成任何麻烦。
按照OAuth的宝石文档[2]的PUT请求的语法应该像以下：
- (Object) put(path, body = '', headers = {})
而从文档的例子：
@token.put('/people/123', @person.to_xml, { 'Accept' => 'application/xml', 'Content-Type' => 'application/xml' })
据我明白，我应该发送一个简单的XML字符串作为PUT请求的主体。所以，让我们先取一些示例数据：
ruby-1.9.2-p290 :003 > xmldata = @access_token.get("https://www.google.com/m8/feeds/contacts/default/full/5f74bf0d5c621a", {"GData-Version" => "3.0"}).body
=> "<?xml version='1.0' encoding='UTF-8'?>
<entry xmlns='http://www.w3.org/2005/Atom' xmlns:gContact='http://schemas.google.com/contact/2008' xmlns:batch='http://schemas.google.com/gdata/batch' xmlns:gd='http://schemas.google.com/g/2005' gd:etag='"R3w4fzVSLit7I2A9WhRaGEQCQgc."'>
<id>http://www.google.com/m8/feeds/contacts/my.email%40address.com/base/5f74bf0d5c621a</id>
<updated>2012-02-22T08:15:36.237Z</updated>
<app:edited xmlns:app='http://www.w3.org/2007/app'>2012-02-22T08:15:36.237Z</app:edited>
<category scheme='http://schemas.google.com/g/2005#kind' term='http://schemas.google.com/contact/2008#contact'/>
<title>Joe Average</title>
<link rel='http://schemas.google.com/contacts/2008/rel#photo' type='image/*' href='https://www.google.com/m8/feeds/photos/media/my.email%40address.com/5f74bf0d5c621a?v=3.0'/>
<link rel='self' type='application/atom+xml' href='https://www.google.com/m8/feeds/contacts/my.email%40address.com/full/5f74bf0d5c621a?v=3.0'/>
<link rel='edit' type='application/atom+xml' href='https://www.google.com/m8/feeds/contacts/my.email%40address.com/full/5f74bf0d5c621a?v=3.0'/>
<gd:name>
<gd:fullName>Joe Average</gd:fullName>
<gd:givenName>Joe</gd:givenName>
<gd:familyName>Average</gd:familyName>
</gd:name>
<gd:email rel='http://schemas.google.com/g/2005#other' address='[email protected]' primary='true'/>
</entry>"
...并尝试更新回谷歌：
ruby-1.9.2-p290 :004 > @access_token.put("https://www.google.com/m8/feeds/contacts/default/full/5f74bf0d5c621a", xmldata, {"GData-Version" => "3.0", 'If-Match' => '"R3w4fzVSLit7I2A9WhRaGEQCQgc."'})
=> #<Net::HTTPUnauthorized 401 Unknown authorization header readbody=true>
所以这是行不通的。让我们尝试剥离下来的XML一点，所以它会看起来就像在文档[1]：
xmldata = "<entry gd:etag='"R3w4fzVSLit7I2A9WhRaGEQCQgc."'>
<id>http://www.google.com/m8/feeds/contacts/my.email%40address.com/base/5f74bf0d5c621a</id>
<updated>2012-02-22T08:15:36.237Z</updated>
<category scheme='http://schemas.google.com/g/2005#kind' term='http://schemas.google.com/contact/2008#contact'/>
<link rel='http://schemas.google.com/contacts/2008/rel#photo' type='image/*' href='https://www.google.com/m8/feeds/photos/media/my.email%40address.com/5f74bf0d5c621a?v=3.0'/>
<link rel='self' type='application/atom+xml' href='https://www.google.com/m8/feeds/contacts/my.email%40address.com/full/5f74bf0d5c621a?v=3.0'/>
<link rel='edit' type='application/atom+xml' href='https://www.google.com/m8/feeds/contacts/my.email%40address.com/full/5f74bf0d5c621a?v=3.0'/>
<gd:name>
<gd:fullName>Joe Average</gd:fullName>
<gd:givenName>Joe</gd:givenName>
<gd:familyName>Average</gd:familyName>
</gd:name>
<gd:email rel='http://schemas.google.com/g/2005#other' address='[email protected]' primary='true'/>
</entry>"
，但没有运气，完全同样的错误了。
这是我现在完全卡住的地方。我会非常感谢任何提示正确的方向。
[1] https://developers.google.com/google-apps/contacts/v3/#updating_contacts
[2] http://rubydoc.info/gems/oauth/0.4.5/OAuth/AccessToken
您可以尝试在文件中格式化请求，然后使用'curl'发出请求，以查看是否可以排除某些可能发生的魔法。弹出的一个可能性是有些东西可能已被编码（例如'"'），这不应该是。 – 2012-03-20 00:59:16