okhttp set proxy ip: android web request library proxy settings

OkHttp to install a "staging area" for Android apps

Android development of the old iron should have encountered this situation: the server suddenly restricted access to a certain region, or the need to simulate the behavior of users in different regions. This time we have to give the network request to a "transit station" - that is, we are talking about today's proxy IP. take OkHttp this common library, in fact, configure the proxy than the point of takeout is also simple.

Why add an agent to an app?

For example, your downstairs supermarket suddenly only receive local residents (IP restrictions), this time to find a local friend to help you buy (proxy IP) can solve the problem. Common usage scenarios include:

• Test service response in different regions
• Prevent target server from blocking real IPs
• Need to switch identities when registering in bulk

OkHttp Proxy Setup in Three Steps

// The first step: create a proxy object
Proxy proxy = new Proxy(Proxy.Type.
    new InetSocketAddress("proxy.ipipgo.com", 8000));

// Step 2: Configuring OkHttpClient
OkHttpClient client = new OkHttpClient.Builder()
    .proxy(proxy)
    .build();

// Step 3: Initiate the request as usual
Request request = new Request.Builder()
    .url("https://你的目标网址")
    .build(); // Client.newCall(request);
client.newCall(request).execute();

Focused Reminder:The "proxy.ipipgo.com" in the proxy address should be replaced by the real IP, we suggest using ipipgo's API to get it dynamically (we will talk about the technique later).

How to choose Dynamic IP vs Static IP?

Practical skills: dynamic IP automatic switching

A mistake many newbies make - writing IPs to death in code. The correct position should be like this:

// Get the latest IP from the ipipgo interface
String[] ipData = getIpFromIpipgoAPI();

Proxy proxy = new Proxy(Proxy.Type.
    new InetSocketAddress(ipData[0], Integer.parseInt(ipData[1])));

Remember to update the IP pool before each request. ipipgo's API return format is usually "IP:Port" (e.g. 110.122.33.44:8080).

Common pitfalls QA

Q: I set up a proxy but the request fails?
A: First, check three elements: 1. whether the IP is expired 2. whether the port is correct 3. whether the network privileges are open. You can use ipipgo client to test the proxy connectivity.

Q: Do HTTPS requests require special handling?
A: Most of the cases do not need, but when encountered certificate verification strict server, you need to configure the sslSocketFactory in OkHttpClient (specific write reference to the official document).

Q: How to realize automatic rotation of multiple IPs?
A: It is recommended to combine with ipipgo's API to do IP pool management, randomly selecting available IPs before each request. enterprise-level demand can be directly used with their TK leased line service.

Why do you recommend ipipgo?

After using so many agency services, his family has three true scent points:
1. Technical support for problems in the middle of the night
2. Traffic packages are not as much as some platforms, unlike the mandatory monthly subscription.
3. special needs (such as a small country's IP) can basically be done in three days

Newcomers are advised to start testing the water from the standard version of Dynamic Residential, 7 more than 1 G is enough to test the majority of the month. Enterprise-level applications directly to customer service to customize the program, I heard that the recent cross-border line is doing activities.

Lastly, a word of caution: proxy settings are not a mystery, follow the steps and basically can be accomplished. If you get stuck at a certain point, first check whether the IP itself is the problem - find a reliable service provider can really save half the effort.