Set Mongoose document root to an html file inside Qt Resource File

[pbdot]

Hi,

I am using Mongoose library to create an instance of web server inside my application (the instance of Mongoose is created inside a worker thread, see my example code below). Currently, the index.html file of the web server sits inside a "web_root" folder in the same folder as the application and when I run my application, I am able to access the file using http://ip-address:8000

I would like to be able to embed the index.html file inside Qt resource file (*.qrc) and have mongoose point to this location. Is that possible?

extern "C" {
#include "mongoose.h"
}

#include "worker.h"
#include <QString>

char command[50];

static const char *s_http_port = "8000";
static struct mg_serve_http_opts s_http_server_opts;

Worker *worker;

void Worker::ev_handler(struct mg_connection *nc, int ev, void *p) {
    struct http_message *hm = (struct http_message *) p;

    if (ev == MG_EV_HTTP_REQUEST) {
        if (mg_vcmp(&hm->uri, "/control") == 0) {
            mg_get_http_var(&hm->body, "command", command,
                            sizeof(command));

            QString receivedCommand(command);
            emit worker->complete(receivedCommand);

            mg_printf(nc, "HTTP/1.1 200 OK\r\nContent-Length: %lu\r\n\r\n%.*s",
                      (unsigned long) hm->body.len, (int) hm->body.len, hm->body.p);
        } else {
            mg_serve_http(nc, (struct http_message *) p, s_http_server_opts);
        }
    }
}


Worker::Worker(QObject *parent) :
    QThread(parent)
{
}

void Worker::run()
{
    worker = this; //This is a workaround to emit signal from static function

    printf("Starting web server on port %s\n", s_http_port);
    mg_mgr_init(&this->mgr, NULL);
    this->nc = mg_bind(&this->mgr, s_http_port, this->ev_handler);

    mg_set_protocol_http_websocket(this->nc);
    s_http_server_opts.document_root = "web_root";

    for (;;) {
        mg_mgr_poll(&this->mgr, 1000);
    }
    mg_mgr_free(&this->mgr);
}

[SGaist]

Hi,

Since Mongoose doesn't know anything about QIODevice the best option would be to copy the file from qrc to a temp location and serve them from there.

[pbdot]

@SGaist said:

Since Mongoose doesn't know anything about QIODevice the best option would be to copy the file from qrc to a temp location and serve them from there.

Hi SGaist, thanks for trick! If there is no other way to do it, maybe I'll do just that.

[SGaist]

Are you providing the file content yourself or does Mongoose do everything himself ?

[pbdot]

@SGaist

Hi SGaist, the content (basically just an index.html file) comes from me. That's why if possible, I would like to embed it in the exe itself.

[SGaist]

Sorry, I meant do you return the content of the file to Mongoose so it can serve it or does it only search for files and you give it path for that ?

[pbdot]

Hi SGaist,

Sorry for not being clear! I pass the web root path (currently the same as the app executable) to Mongoose for it to serve.

[SGaist]

Then unless you modify Mongoose to use QFile/QDir, the temp dir copy is pretty much your only solution.

[pbdot]

Got it! Many thanks SGaist!