How to read a pdf file in Vertx?

Question

I am new to VertX and I want to read a pdf using the "GET" method. I know that buffer will be used. But there are no resources on the internet on how to do that.

Where is this PDF file stored at first? What have you tried so far? — tmarwen, Oct 09 '21 at 15:18
The pdf file is in a couchbase DB. I am using webclient to get the pdf file. So I have to get the pdf and send it as a http response. — Utkal keshari Sahu, Oct 10 '21 at 08:28

score 0 · Accepted Answer · answered Oct 10 '21 at 14:56

0

Omitting the details of how you would get the file from your data store (couchbase DB), it is fair to assume the data is read correctly into a byte[].

Once the data is read, you can feed it to an io.vertx.core.buffer.Buffer that can be used to shuffle data to the HttpServerResponse as follows:

public void sendPDFFile(byte[] fileBytes, HttpServerResponse response) {
    Buffer buffer = Buffer.buffer(fileBytes);
    response.putHeader("Content-Type", "application/pdf")
            .putHeader("Content-Length", String.valueOf(buffer.length()))
            .setStatusCode(200)
            .end(buffer);
}

answered Oct 10 '21 at 14:56

tmarwen

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What is the purpose of storing it in byte[] array and then using Buffer.buffer() ? – Utkal keshari Sahu Oct 11 '21 at 01:56
Because `io.vertx.core.buffer.Buffer` is the internal data wrapper used by *Vert.x* to move data around and to achieve common data access interface. Additionally, using the specific `io.vertx.core.buffer.Buffer` type allows to pipe and stream data as needed instead of sending batched data. – tmarwen Oct 11 '21 at 10:25
Got it. Thank you. – Utkal keshari Sahu Oct 11 '21 at 15:18

How to read a pdf file in Vertx?

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