我正在尝试在我的网站中使用 Google Client API 在 Symfony2 中编写 Google 登录.我按照说明 here ，但是当我调用 $client->authenticate($code);命令抛出异常，提示:
无法连接到 www.googleapis.com 端口 443:网络无法访问
有什么问题？

最佳答案

解决方案 2(来自更新)。 它似乎是 ipv6 接口(interface)和 php curl 的一些错误，所以另一种解决方案是在 curl 函数中设置适当的选项以在你的 php 脚本中使用 ipv4 连接到远程服务器

curl_setopt($curl, CURLOPT_IPRESOLVE, CURL_IPRESOLVE_V4);

解决方案 1。

同样的事情发生在我身上(通过将 ip v4 和主机名添加到/etc/hosts 文件来解决)，正如@hans-z 在另一个回答评论中所指出的，我尝试使用下一个命令来验证网络问题。

curl -v https://www.googleapis.com 

原来是随机的，只有十分之一的 curl 命令尝试可以连接到服务器，响应是这样的: (“La red es inaccesible”在英语中的意思是“网络无法访问”:))

$ curl -v https://www.googleapis.com
* Rebuilt URL to: https://www.googleapis.com/
* Hostname was NOT found in DNS cache
*   Trying 64.233.186.95...
*   Trying 2800:3f0:4003:c00::5f...
* connect to 2800:3f0:4003:c00::5f port 443 failed: La red es inaccesible
* Failed to connect to www.googleapis.com port 443: La red es inaccesible
* Closing connection 0
curl: (7) Failed to connect to www.googleapis.com port 443: La red es inaccesible

成功的响应是:

curl -v https://www.googleapis.com
* Rebuilt URL to: https://www.googleapis.com/
* Hostname was NOT found in DNS cache
*   Trying 64.233.186.95...
*   Trying 2800:3f0:4003:c00::5f...
* Connected to www.googleapis.com (64.233.186.95) port 443 (#0)
* successfully set certificate verify locations:
*   CAfile: none
  CApath: /etc/ssl/certs
* SSLv3, TLS handshake, Client hello (1):
* SSLv3, TLS handshake, Server hello (2):
* SSLv3, TLS handshake, CERT (11):
* SSLv3, TLS handshake, Server key exchange (12):
* SSLv3, TLS handshake, Server finished (14):
* SSLv3, TLS handshake, Client key exchange (16):
* SSLv3, TLS change cipher, Client hello (1):
* SSLv3, TLS handshake, Finished (20):
* SSLv3, TLS change cipher, Client hello (1):
* SSLv3, TLS handshake, Finished (20):
* SSL connection using ECDHE-RSA-AES128-GCM-SHA256
* Server certificate:
*    subject: C=US; ST=California; L=Mountain View; O=Google Inc; CN=*.storage.googleapis.com
*    start date: 2015-04-08 14:12:01 GMT
*    expire date: 2015-07-07 00:00:00 GMT
*    subjectAltName: www.googleapis.com matched
*    issuer: C=US; O=Google Inc; CN=Google Internet Authority G2
*    SSL certificate verify ok.
> GET / HTTP/1.1
> User-Agent: curl/7.35.0
> Host: www.googleapis.com
> Accept: */*
> 
< HTTP/1.1 404 Not Found
< Cache-Control: no-cache, no-store, max-age=0, must-revalidate
< Pragma: no-cache
< Expires: Fri, 01 Jan 1990 00:00:00 GMT
< Date: Tue, 21 Apr 2015 21:38:12 GMT
< Vary: X-Origin
< Content-Type: text/html; charset=UTF-8
< X-Content-Type-Options: nosniff
< X-Frame-Options: SAMEORIGIN
< X-XSS-Protection: 1; mode=block
* Server GSE is not blacklisted
< Server: GSE
< Alternate-Protocol: 443:quic,p=1
< Accept-Ranges: none
< Vary: Origin,Accept-Encoding
< Transfer-Encoding: chunked
< 
* Connection #0 to host www.googleapis.com left intact

奇怪的消息是“在 DNS 缓存中找不到主机名”，我使用的是 google DNS 的 4.4.4.4 和 8.8.8.8，所以我使用 curl 命令输出中的 ipv4 将该域添加到我的/etc/hosts 文件中问题就解决了。

#/etc/hosts
...
64.233.186.95 www.googleapis.com
#DONT COPY THIS IP, USE THE ONE FROM YOUR CURL OUTPUT
...

关于php - 无法连接到 www.googleapis.com 端口 443 : Network unreachable，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/28366402/