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Merge pull request #215 from chrisws/master
Tidy up request implementation
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110 changes: 110 additions & 0 deletions
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src/platform/android/app/src/main/java/net/sourceforge/smallbasic/HttpConnection.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,110 @@ | ||
| package net.sourceforge.smallbasic; | ||
|
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| import androidx.annotation.NonNull; | ||
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| import java.io.BufferedReader; | ||
| import java.io.IOException; | ||
| import java.io.InputStream; | ||
| import java.io.InputStreamReader; | ||
| import java.io.OutputStream; | ||
| import java.net.HttpURLConnection; | ||
| import java.net.URL; | ||
| import java.nio.charset.StandardCharsets; | ||
| import java.util.concurrent.CountDownLatch; | ||
| import java.util.concurrent.TimeUnit; | ||
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| public class HttpConnection implements Runnable { | ||
| private static final int TIMEOUT_MILLIS = 30000; | ||
| private static final String ERROR_PREFIX = "error: ["; | ||
| private static final String ERROR_POSTFIX = "]"; | ||
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| private final String endPoint; | ||
| private final String data; | ||
| private final String apiKey; | ||
| private final CountDownLatch latch; | ||
| private String result; | ||
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| public HttpConnection(String endPoint, String data, String apiKey) { | ||
| this.endPoint = endPoint; | ||
| this.data = data; | ||
| this.apiKey = apiKey; | ||
| this.latch = new CountDownLatch(1); | ||
| } | ||
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| public String invoke() { | ||
| new Thread(this).start(); | ||
| try { | ||
| if (!latch.await(TIMEOUT_MILLIS, TimeUnit.MILLISECONDS)) { | ||
| result = buildError("timeout"); | ||
| } | ||
| } catch (InterruptedException e) { | ||
| result = buildError(e.toString()); | ||
| } | ||
| return result; | ||
| } | ||
|
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| @Override | ||
| public void run() { | ||
| HttpURLConnection conn = null; | ||
| try { | ||
| conn = getHttpURLConnection(endPoint, (data == null || data.isEmpty()) ? "GET" : "POST", apiKey); | ||
| if (data != null && !data.isEmpty()) { | ||
| conn.setRequestProperty("Content-Length", "" + data.getBytes().length); | ||
| conn.setDoInput(true); | ||
| OutputStream os = conn.getOutputStream(); | ||
| os.write(data.getBytes(StandardCharsets.UTF_8)); | ||
| os.flush(); | ||
| os.close(); | ||
| } | ||
| int responseCode = conn.getResponseCode(); | ||
| if (responseCode == HttpURLConnection.HTTP_OK) { | ||
| result = getText(conn.getInputStream()); | ||
| } else if (responseCode >= HttpURLConnection.HTTP_BAD_REQUEST && responseCode < HttpURLConnection.HTTP_INTERNAL_ERROR) { | ||
| result = buildError(getText(conn.getErrorStream())); | ||
| } else { | ||
| result = buildError(String.valueOf(responseCode)); | ||
| } | ||
| } catch (Exception e) { | ||
| result = buildError(e.toString()); | ||
| } finally { | ||
| if (conn != null) { | ||
| conn.disconnect(); | ||
| } | ||
| } | ||
| latch.countDown(); | ||
| } | ||
|
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| @NonNull | ||
| private static String buildError(String message) { | ||
| return ERROR_PREFIX + message + ERROR_POSTFIX; | ||
| } | ||
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| @NonNull | ||
| private HttpURLConnection getHttpURLConnection(String endPoint, String method, String apiKey) throws IOException { | ||
| URL url = new URL(endPoint); | ||
| HttpURLConnection result = (HttpURLConnection) url.openConnection(); | ||
| result.setRequestMethod(method); | ||
| result.setRequestProperty("User-Agent", "SmallBASIC"); | ||
| result.setConnectTimeout(TIMEOUT_MILLIS); | ||
| result.setInstanceFollowRedirects(true); | ||
| if (apiKey != null && !apiKey.isEmpty()) { | ||
| result.setRequestProperty("Accept", "application/json"); | ||
| result.setRequestProperty("Content-Type", "application/json"); | ||
| result.setRequestProperty("Authorization", "Bearer " + apiKey); | ||
| } else { | ||
| result.setRequestProperty("Accept", "*/*"); | ||
| } | ||
| return result; | ||
| } | ||
|
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| private String getText(InputStream stream) throws IOException { | ||
| BufferedReader in = new BufferedReader(new InputStreamReader(stream)); | ||
| String inputLine; | ||
| StringBuilder response = new StringBuilder(); | ||
| while ((inputLine = in.readLine()) != null) { | ||
| response.append(inputLine); | ||
| } | ||
| in.close(); | ||
| return response.toString(); | ||
| } | ||
| } |
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