How to fix 'Not found' when display HTML with Crow?

Question

I use windows10.I use crow, when display page with string,it works. But when display page with a html file, return "Not found". main.cpp

#include "crow_all.h"
using namespace std;
using namespace crow;

int main(int argc, char* argv[]) 
{
    crow::SimpleApp app;

    CROW_ROUTE(app, "/")
    ([](const crow::request &req, crow::response &res)
    {
        ifstream in("file:///C://Users//Auly//Desktop//cppweb//hello_crow//public//index.html", ifstream::in);
        if (in)
        {
            ostringstream contents;
            contents << in.rdbuf();
            in.close();
            res.write(contents.str());
        } 
        else 
        {
            res.write("Not found");
        } 
        res.end();
    });

    char* port = getenv("PORT");
    uint16_t iPort = static_cast<uint16_t>(port != NULL? stoi(port): 18080);
    cout << "PORT = " << iPort << endl;
    app.port(iPort).multithreaded().run();
}

index.html

#include "crow_all.h"
using namespace std;
using namespace crow;

int main(int argc, char* argv[]) 
{
    crow::SimpleApp app;
       
    CROW_ROUTE(app, "/")
    ([](const crow::request& req, crow::response& res)
    {
        ifstream in("../public/index.html", ifstream::in);
        if (in)
        {
            ostringstream contents;
            contents << in.rdbuf();
            in.close();
            res.write(contents.str());
        } 
        else 
        {
            res.write("Not found");
        }
        res.end();
    });

    char* port = getenv("PORT");
    uint16_t iPort = static_cast<uint16_t>(port != NULL? stoi(port): 18080);
    cout << "PORT = " << iPort << endl;
    app.port(iPort).multithreaded().run();
}

hello_crow/Dockerfile

FROM hello_crow
WORKDIR /usr/src/cppweb/hello_crow/build
CMD ["./hello_crow"]

• cppweb
  • cppbox
    • Dockerfile
  • hello_crow
    • build
    • public
      • index.html
    • crow_all.h
    • main.cpp
    • Dockerfile

In terminal:

/usr/src/cppweb/hello_crow/build:make

docker run -v /mnt/c/Users/Auly/Desktop/cppweb:/usr/src/cppweb -p 8080:8080 -e PORT=8080 cppbox:latest /usr/src/cppweb/hello_crow/build/hello_crow

It should be: docker run -v /mnt/c/Users/Auly/Desktop/cppweb:/usr/src/cppweb -p 8080:8080 -e PORT=8080 hello_crow:latest /usr/src/cppweb/hello_crow/build/hello_crow Then it works when use "../public/index.html".
I try relative path:"../public/index.html", absolute path:"C:/Users/Auly/Desktop/cppweb/hello_crow/public/index.html" and container path:"usr/src/cppweb/hello_crow/public/index.html". All of them return Not found. How can I fix it? solution: Run it on WSL and set path "usr/src/cppweb/hello_crow/public/index.html".
when I run "docker build -t hello_crow ." in hello_crow directory. I get this message:

[+] Building 0.9s (6/6) FINISHED
 => [internal] load build definition from Dockerfile                                                                            0.2s
 => => transferring dockerfile: 114B                                                                                            0.0s
 => [internal] load .dockerignore                                                                                               0.2s
 => => transferring context: 2B                                                                                                 0.0s
 => [internal] load metadata for docker.io/library/hello_crow:latest                                                            0.0s
 => [1/2] FROM docker.io/library/hello_crow                                                                                     0.5s
 => [2/2] WORKDIR /usr/src/cppweb/hello_crow/build                                                                              0.1s
 => exporting to image                                                                                                          0.1s
 => => exporting layers                                                                                                         0.1s
 => => writing image sha256:0baf55adb5f5e184956c1500b7e9c80c20f410a103dc68b984f9ec0f73da4f6e                                    0.0s
 => => naming to docker.io/library/hello_crow

Why it show [2/2] lines command? Dockerfile have 3 lines.

Answer 1

In your case it would be best to use Mustache to render html files instead of ifstream.

for the file not found issue it seems John Hanley's comment should solve it.