-
Notifications
You must be signed in to change notification settings - Fork 12
/
DownloadProgress.java
132 lines (113 loc) · 5.21 KB
/
DownloadProgress.java
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
/*
* Copyright (c) 2019, 2020 Moataz Abdelnasser
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package com.github.mizosoft.methanol.samples.progress;
import static com.github.mizosoft.methanol.MutableRequest.GET;
import static java.net.http.HttpResponse.BodySubscribers.discarding;
import static java.net.http.HttpResponse.BodySubscribers.replacing;
import com.github.mizosoft.methanol.Methanol;
import com.github.mizosoft.methanol.MutableRequest;
import com.github.mizosoft.methanol.ProgressTracker;
import java.net.http.HttpRequest.BodyPublishers;
import java.net.http.HttpResponse;
import java.net.http.HttpResponse.BodySubscriber;
import java.net.http.HttpResponse.ResponseInfo;
import java.util.OptionalLong;
import java.util.concurrent.CompletableFuture;
import javafx.application.Application;
import javafx.application.Platform;
import javafx.geometry.HPos;
import javafx.geometry.Insets;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.ProgressBar;
import javafx.scene.control.TextField;
import javafx.scene.layout.ColumnConstraints;
import javafx.scene.layout.GridPane;
import javafx.scene.layout.Priority;
import javafx.stage.Stage;
public class DownloadProgress extends Application {
private static final int WIDTH = 400;
private static final int HEIGHT = 100;
private static final String DEFAULT_URL = "https://norvig.com/big.txt";
private final Methanol client = Methanol.create();
private final ProgressTracker tracker =
ProgressTracker.newBuilder()
.bytesTransferredThreshold(50 * 1024) // get an event each 50KB at least
.executor(Platform::runLater) // execute listener on JavaFX Application Thread
.build();
private final ProgressBar progressBar = new ProgressBar(0.d);
private final TextField urlTextField = new TextField(DEFAULT_URL);
private final Button downloadButton = new Button("Download");
@Override
public void start(Stage primaryStage) {
var gridPane = new GridPane();
gridPane.setHgap(10.d);
gridPane.setVgap(10.d);
gridPane.setPadding(new Insets(18.d));
var growable = new ColumnConstraints();
growable.setHgrow(Priority.ALWAYS);
var notGrowable = new ColumnConstraints();
notGrowable.setHgrow(Priority.NEVER);
gridPane.getColumnConstraints().addAll(growable, notGrowable);
gridPane.add(urlTextField, 0, 0);
gridPane.add(downloadButton, 1, 0);
gridPane.add(progressBar, 0, 1, 2, 1);
progressBar.setMaxWidth(Double.MAX_VALUE);
GridPane.setHalignment(downloadButton, HPos.RIGHT);
setDownloadListener();
primaryStage.setTitle("Download Progress");
primaryStage.setScene(new Scene(gridPane, WIDTH, HEIGHT));
primaryStage.show();
}
private void setDownloadListener() {
downloadButton.setOnAction(e -> {
progressBar.setProgress(0.d);
downloadButton.setDisable(true); // disable while sending and re-enable when finished
downloadUrlAsync(urlTextField.getText())
.whenComplete((r, t) -> Platform.runLater(() -> downloadButton.setDisable(false)));
});
}
private CompletableFuture<Void> downloadUrlAsync(String url) {
return getContentLengthAsync(url)
.thenCompose(len -> client.sendAsync(GET(url), info -> trackingWithLength(len)))
.thenApply(HttpResponse::body);
}
/** Make a HEAD request to know resource's uncompressed length for determinate progress. */
private CompletableFuture<Long> getContentLengthAsync(String url) {
MutableRequest request =
MutableRequest.create(url)
.method("HEAD", BodyPublishers.noBody())
.headers("Accept-Encoding", "identity"); // overrides Methanol's autoAcceptEncoding
return client.sendAsync(request, DownloadProgress::ofContentLength)
.thenApply(res -> res.body().orElseThrow());
}
/** Tracks a {@code BodySubscriber} with a predefined length. */
private BodySubscriber<Void> trackingWithLength(long length) {
return tracker.tracking(discarding(), p -> progressBar.setProgress(p.value()), length);
}
private static BodySubscriber<OptionalLong> ofContentLength(ResponseInfo info) {
return replacing(info.headers().firstValueAsLong("Content-Length"));
}
public static void main(String[] args) {
launch(args);
}
}