如何从Android设备访问本地REST API? [英] How can I access my local REST api from my android device?
问题描述
我的计算机上本地运行有一个Spring REST api.我想使用此api进行android开发.
I have a spring REST api running locally on my computer. I would like to consume this api for android development.
这是我的获取请求:
public static String sendGet(final String url) {
StringBuilder result = new StringBuilder();
HttpURLConnection urlConnection = null;
try {
String apiUrl = getAbsoluteUrl(url); // concatenate uri with base url eg: localhost:8080/ + uri
URL requestUrl = new URL(apiUrl);
urlConnection = (HttpURLConnection) requestUrl.openConnection();
urlConnection.connect(); // no connection is made
InputStream in = new BufferedInputStream(urlConnection.getInputStream());
BufferedReader reader = new BufferedReader(new InputStreamReader(in));
String line;
while ((line = reader.readLine()) != null) {
result.append(line);
}
} catch (Exception e) {
e.printStackTrace();
} finally {
urlConnection.disconnect();
}
return result.toString();
}
我可以通过设备的浏览器访问我的api.但是,当我在内置apk中使用相同的URL发出请求时,没有建立连接.
I can access my api via my device's browser. However, when I use this same url within the built apk to make the request, no connection is made.
我的清单包括:
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
旁注:
我正在通过USB将设备连接到运行rest api的笔记本电脑. 我正在使用通过调用ipconfig找到的WLAN IPv4地址.
I am connecting my device to my laptop running the rest api via usb. I am using the WLAN IPv4 address found by calling ipconfig.
任何朝着正确方向的提示将不胜感激-谢谢!
Any tips in the right direction would be much appreciated - thanks!
编辑以包括从我的笔记本电脑上运行的本地REST api输出的chrome浏览器(在android设备上)输出(返回默认来宾用户信息的GET请求):
Edit to include chrome browser (on android device) output from local REST api running on my laptop (A GET request to return default guest user information):
推荐答案
已解决,如果有人有兴趣:
SOLVED if anyone is interested:
我设法通过扩展原来的sendGet(final String url)
所在的类来解决此问题,如下所示HttpClientUsage extends AsyncTask<String, Void, String>
更多信息,并且可以在此处找到教程:
I managed to fix this issue by extending the class my original sendGet(final String url)
was in as follows HttpClientUsage extends AsyncTask<String, Void, String>
more information and a tutorial can be found here: AsyncTask tutorial
然后我必须在本地REST API上配置我的CORS设置,如下所示:
I then had to configure my CORS settings on my local REST API as follows:
cors:
allowed-origins: "*"
allowed-methods: GET, PUT, POST, DELETE, OPTIONS
allowed-headers: "*"
exposed-headers:
allow-credentials: true
max-age: 1800
非常感谢您的帮助.
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