Android4.04下載源碼圖解～解決公網IP不能直接存取問題

之前下的ANDROID4.0.1很順利下來下來，有很多人問，後來才知道有很多人問關於報以下錯誤的

上面是連結GOOGLE源碼伺服器逾時，也就是說不能訪問到GOOGLE源碼伺服器，這個問題，沒想到在我重新裝的機子上不小心發現了，既然發現來就出來解決下吧，剛開始，一開始，我們肯定是先看官方文檔，看看情況：

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:

$ 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:

$ 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:

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

以上是我在官方摘錄下來的，主題是：使用認證，並且上面提到預設訪問ANDROID源碼是通過匿名訪問的，然而為來保護過度使用伺服器，且配置來每個IP地址的訪問方式，在上面的英文寫得很清楚，自己去看看吧，太晚來，我也不再翻譯來，很簡單的，那我就來幾張簡單的操作吧：

在這裡需要提醒下，先要通過訪問：https://android.googlesource.com/new-password來獲得相關認證的使用者名稱與密碼：

點擊允許，進入頁面,要求你輸入一個郵箱的使用者名稱與密碼，然後得出其以下頁面顯示：

細心點的人就會看到這麼一句話：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.

這是需要你去你本系統的~/下建立一個.netrc檔案,預設系統下是沒有的，然後把其獲得的兩行：

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

拷貝進去，然後儲存，然後重新執行：

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

記住與之前的多來個a路徑哦,再接著，執行：

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

就OK了，為來讓各位放心去操作，我把成功操作的圖都截取下來：

看看，速度還是挺快的，1016KIB/S了，OK，還沒有解決其相關問題的童鞋，你還在等什麼呢，試著操作一下吧，最新體驗的總是有你才是.......