public/cordova-plugin-webserver
public/cordova-plugin-webserver
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add file responses

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This commit is contained in:
Keith Wait 2018-08-11 21:48:30 -05:00
parent 390a03551c
commit 60f55066ce
4 changed files with 136 additions and 1 deletions
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106
src/android/NanoHTTPDWebserver.java
View File

@ -81,6 +81,105 @@ public class NanoHTTPDWebserver extends NanoHTTPD {
}
}
Response serveFile(Map<String, String> header, File file, String mime) {
Response res;
try {
// Calculate etag
String etag = Integer.toHexString((file.getAbsolutePath() + file.lastModified() + "" + file.length()).hashCode());
// Support (simple) skipping:
long startFrom = 0;
long endAt = -1;
String range = header.get("range");
if (range != null) {
if (range.startsWith("bytes=")) {
range = range.substring("bytes=".length());
int minus = range.indexOf('-');
try {
if (minus > 0) {
startFrom = Long.parseLong(range.substring(0, minus));
endAt = Long.parseLong(range.substring(minus + 1));
}
} catch (NumberFormatException ignored) {
}
}
}
// get if-range header. If present, it must match etag or else we
// should ignore the range request
String ifRange = header.get("if-range");
boolean headerIfRangeMissingOrMatching = (ifRange == null || etag.equals(ifRange));
String ifNoneMatch = header.get("if-none-match");
boolean headerIfNoneMatchPresentAndMatching = ifNoneMatch != null && ("*".equals(ifNoneMatch) || ifNoneMatch.equals(etag));
// Change return code and add Content-Range header when skipping is
// requested
long fileLen = file.length();
if (headerIfRangeMissingOrMatching && range != null && startFrom >= 0 && startFrom < fileLen) {
// range request that matches current etag
// and the startFrom of the range is satisfiable
if (headerIfNoneMatchPresentAndMatching) {
// range request that matches current etag
// and the startFrom of the range is satisfiable
// would return range from file
// respond with not-modified
res = newFixedLengthResponse(Status.NOT_MODIFIED, mime, "");
res.addHeader("ETag", etag);
} else {
if (endAt < 0) {
endAt = fileLen - 1;
}
long newLen = endAt - startFrom + 1;
if (newLen < 0) {
newLen = 0;
}
FileInputStream fis = new FileInputStream(file);
fis.skip(startFrom);
res = Response.newFixedLengthResponse(Status.PARTIAL_CONTENT, mime, fis, newLen);
res.addHeader("Accept-Ranges", "bytes");
res.addHeader("Content-Length", "" + newLen);
res.addHeader("Content-Range", "bytes " + startFrom + "-" + endAt + "/" + fileLen);
res.addHeader("ETag", etag);
}
} else {
if (headerIfRangeMissingOrMatching && range != null && startFrom >= fileLen) {
// return the size of the file
// 4xx responses are not trumped by if-none-match
res = newFixedLengthResponse(Status.RANGE_NOT_SATISFIABLE, NanoHTTPD.MIME_PLAINTEXT, "");
res.addHeader("Content-Range", "bytes */" + fileLen);
res.addHeader("ETag", etag);
} else if (range == null && headerIfNoneMatchPresentAndMatching) {
// full-file-fetch request
// would return entire file
// respond with not-modified
res = newFixedLengthResponse(Status.NOT_MODIFIED, mime, "");
res.addHeader("ETag", etag);
} else if (!headerIfRangeMissingOrMatching && headerIfNoneMatchPresentAndMatching) {
// range request that doesn't match current etag
// would return entire (different) file
// respond with not-modified
res = newFixedLengthResponse(Status.NOT_MODIFIED, mime, "");
res.addHeader("ETag", etag);
} else {
// supply the file
res = newFixedFileResponse(file, mime);
res.addHeader("Content-Length", "" + fileLen);
res.addHeader("ETag", etag);
}
}
} catch (IOException ioe) {
res = getForbiddenResponse("Reading file failed.");
}
return res;
}
@Override
public Response serve(IHTTPSession session) {
Log.d(this.getClass().getName(), "New request is incoming!");
@ -97,7 +196,7 @@ public class NanoHTTPDWebserver extends NanoHTTPD {
pluginResult.setKeepCallback(true);
this.webserver.onRequestCallbackContext.sendPluginResult(pluginResult);
while (!this.webserver.responses.containsKey(requestUUID)) {
while (!this.webserver.responses.containsKey(requestUUID) && !this.webserver.responses.containsKey('file')) {
try {
Thread.sleep(1);
} catch (InterruptedException e) {
@ -105,6 +204,11 @@ public class NanoHTTPDWebserver extends NanoHTTPD {
}
}
if (this.webserver.responses.containsKey('file')) {
// TODO should specify a more correct mime-type
return serveFile(session.getHeaders(), new File((String) this.webserver.responses.get('file')), 'application/octet-stream');
}
JSONObject responseObject = (JSONObject) this.webserver.responses.get(requestUUID);
Log.d(this.getClass().getName(), "responseObject: " + responseObject.toString());
Response response = null;

9
src/android/Webserver.java
View File

@ -44,6 +44,10 @@ public class Webserver extends CordovaPlugin {
this.sendResponse(args, callbackContext);
return true;
}
else if ("sendFileResponse".equals(action)) {
this.sendFileResponse(args, callbackContext);
return true;
}
return false; // Returning false results in a "MethodNotFound" error.
}
@ -96,6 +100,11 @@ public class Webserver extends CordovaPlugin {
callbackContext.sendPluginResult(new PluginResult(PluginResult.Status.OK));
}
private void sendFileResponse(JSONArray args, CallbackContext callbackContext) throws JSONException {
this.responses.put('file', args.get(1));
callbackContext.sendPluginResult(new PluginResult(PluginResult.Status.OK));
}
/**
* Just register the onRequest and send no result. This is needed to save the callbackContext to
* invoke it later

16
src/www/webserver.js
View File

@ -4,6 +4,7 @@ const WEBSERVER_CLASS = 'Webserver';
const START_FUNCTION = 'start';
const ONREQUEST_FUNCTION = 'onRequest';
const SENDRESPONSE_FUNCION = 'sendResponse';
const SENDFILE_FUNCION = 'sendFileResponse';
const STOP_FUNCTION = 'stop';
export function start(success_callback, error_callback, port) {
@ -45,6 +46,21 @@ export function sendResponse(
);
}
export function sendFile(
requestId,
params,
success_callback,
error_callback
) {
exec(
success_callback,
error_callback,
WEBSERVER_CLASS,
SENDFILE_FUNCION,
[requestId, params]
);
}
export function stop(success_callback, error_callback) {
exec(
success_callback,

6
webserver.js
View File

@ -6,6 +6,7 @@ Object.defineProperty(exports, "__esModule", {
exports.start = start;
exports.onRequest = onRequest;
exports.sendResponse = sendResponse;
exports.sendFile = sendFile;
exports.stop = stop;
var _exec = require('cordova/exec');
@ -18,6 +19,7 @@ var WEBSERVER_CLASS = 'Webserver';
var START_FUNCTION = 'start';
var ONREQUEST_FUNCTION = 'onRequest';
var SENDRESPONSE_FUNCION = 'sendResponse';
var SENDFILE_FUNCION = 'sendFileResponse';
var STOP_FUNCTION = 'stop';
function start(success_callback, error_callback, port) {
@ -38,6 +40,10 @@ function sendResponse(requestId, params, success_callback, error_callback) {
(0, _exec2.default)(success_callback, error_callback, WEBSERVER_CLASS, SENDRESPONSE_FUNCION, [requestId, params]);
}
function sendFile(requestId, params, success_callback, error_callback) {
(0, _exec2.default)(success_callback, error_callback, WEBSERVER_CLASS, SENDFILE_FUNCION, [requestId, params]);
}
function stop(success_callback, error_callback) {
(0, _exec2.default)(success_callback, error_callback, WEBSERVER_CLASS, STOP_FUNCTION, []);
}