Android4.04下载源码图解～解决公网IP不能直接访问问题

转自http://blog.csdn.net/jiangshide/article/details/7529971

之前下的ANDROID4.0.1很顺利下来下来，有很多人问，后来才知道有很多人问关于报以下错误的


上面是链接GOOGLE源码服务器超时，也就是说不能访问到GOOGLE源码服务器，这个问题，没想到在我重新装的机子上不小心发现了，既然发现来就出来解决下吧，刚开始，一开始，我们肯定是先看官方文档，看看情况：

Using authentication

By default, access to the Android source code is anonymous. To protect the servers against excessive usage, each IP address is associated with a quota.

When sharing an IP address with other users (e.g. when accessing the source repositories from beyond a NAT firewall), the quotas can trigger even for regular usage patterns (e.g. if many users sync new clients from the same IP address within a short period).

In that case, it is possible to use authenticated access, which then uses a separate quota for each user, regardless of the IP address.

The first step is to create a password from the password generator and to save it in

~/.netrc

according
to the instructions on that page.

The second step is to force authenticated access, by using the following manifest URI:

https://android.googlesource.com/a/platform/manifest

. Notice how the

/a/

directory
prefix triggers mandatory authentication. You can convert an existing client to use mandatory authentication with the following command:

[code]$ repo init -u https://android.googlesource.com/a/platform/manifest

Troubleshooting network issues

When downloading from behind a proxy (which is common in some corporate environments), it might be necessary to explicitly specify the proxy that is then used by repo:

[code]$ export HTTP_PROXY=http://<proxy_user_id>:<proxy_password>@<proxy_server>:<proxy_port>
$ export HTTPS_PROXY=http://<proxy_user_id>:<proxy_password>@<proxy_server>:<proxy_port>

More rarely, Linux clients experience connectivity issues, getting stuck in the middle of downloads (typically during "Receiving objects"). It has been reported that tweaking the settings of the TCP/IP stack and using non-parallel commands can improve the situation.
You need root access to modify the TCP setting:

[code]$ sudo sysctl -w net.ipv4.tcp_window_scaling=0
$ repo sync -j1

以上是我在官方摘录下来的，主题是：使用认证，并且上面提到默认访问ANDROID源码是通过匿名访问的，然而为来保护过度使用服务器，且配置来每个IP地址的访问方式，在上面的英文写得很清楚，自己去看看吧，太晚来，我也不再翻译来，很简单的，那我就来几张简单的截图操作吧：

在这里需要提醒下，先要通过访问：https://android.googlesource.com/new-password来获得相关认证的用户名与密码：



点击允许，进入页面,要求你输入一个邮箱的用户名与密码，然后得出其以下页面显示：



细心点的人就会看到这么一句话：he first step is to create a password from the
password generator and to save it in

~/.netrc

according
to the instructions on that page.

这是需要你去你本系统的~/下新建一个.netrc文件,默认系统下是没有的，然后把其获得的两行：

machine android.googlesource.com login git-jiangshide8.gmail.com password 1/6PLFhB-9Rbtl7-TAzm9Bzj_zKuxGNq5ALCzFfSuhHgs

machine android-review.googlesource.com login git-jiangshide8.gmail.com password 1/6PLFhB-9Rbtl7-TAzm9Bzj_zKuxGNq5ALCzFfSuhHgs

拷贝进去，然后保存，然后重新执行：

[code]$ repo init -u https://android.googlesource.com/a/platform/manifest[/code] 
记住与之前的多来个a路径哦,再接着，执行：
[code]sudo sysctl -w net.ipv4.tcp_window_scaling=0
$ repo sync -j1

就OK了，为来让各位放心去操作，我把成功操作的图都截取下来：