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!