I got the following question, I can't get image which I'm sending from android app to server, I'm sending image from app using kotlin, and receiving it on server written with Java using vert.x.
I send it with following code:
val serverUrl = "http://192.168.56.1:8080/recognize/get_text_from_image"
val client = OkHttpClient.Builder()
.build()
val stream = ByteArrayOutputStream()
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, stream)
val byteArray = stream.toByteArray()
val encodedImage: String = encodeToString(byteArray, DEFAULT)
val requestBody: RequestBody = RequestBody.create(MediaType.parse("image/*jpg"), encodedImage)
val request: Request = Request.Builder()
.url(serverUrl)
.post(requestBody)
.build()
on server side I'm handling it like
Router baseRouter = Router.router(vertx);
Router apiRouter = Router.router(vertx);
baseRouter.mountSubRouter("/recognize", apiRouter);
vertx.createHttpServer()
.requestHandler(baseRouter::accept)
.listen(8080, result -> {
if (result.succeeded()) {
System.out.println("completed");
startFuture.complete();
} else {
startFuture.fail(result.cause());
System.out.println(result.cause().getLocalizedMessage());
}
});
apiRouter.route(HttpMethod.POST, "/get_text_from_image").handler(rc -> {
BufferedImage bufferedImage = null;
byte[] imageByte;
try {
BASE64Decoder decoder = new BASE64Decoder();
imageByte = decoder.decodeBuffer(rc.getBodyAsString());
ByteArrayInputStream bis = new ByteArrayInputStream(imageByte);
bufferedImage = ImageIO.read(bis);
bis.close();
System.out.println("Decoding bytes to image");
} catch (Exception e) {
e.printStackTrace();
System.out.println("Error while decoding bytes to image");
}
File outputfile = new File("/home/user/image.jpg");
try {
ImageIO.write(bufferedImage, "jpg", outputfile);
System.out.println("Saving image");
} catch (IOException e) {
e.printStackTrace();
System.out.println("Error while saving image");
}
JsonObject json = rc.getBodyAsJson();
System.out.println(json.getString("id"));
HttpServerResponse response = rc.response();
response.putHeader("content-type", "application/json");
// Write to the response and end it
response.end("{\"status\": 200}");
});
}
But I can't get anything into imageByte variable.
You need to add BodyHandler before all routes
Router baseRouter = Router.router(vertx);
baseRouter.route().handler(BodyHandler.create());
more info here https://vertx.io/preview/docs/apidocs/io/vertx/ext/web/handler/BodyHandler.html
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