File RequestHandlersImpl.h

File List > arduino > libraries > ext > WebServer > detail > RequestHandlersImpl.h

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#pragma once

#include "RequestHandler.h"
#include "Uri.h"
#include "WString.h"
#include "mimetable.h"

using namespace mime;

class FunctionRequestHandler : public RequestHandler {
  public:
    FunctionRequestHandler(
        WebServer::THandlerFunction fn,
        WebServer::THandlerFunction ufn,
        const Uri &uri,
        HTTPMethod method
    )
        : _fn(fn), _ufn(ufn), _uri(uri.clone()), _method(method) {
        _uri->initPathArgs(pathArgs);
    }

    ~FunctionRequestHandler() {
        delete _uri;
    }

    bool canHandle(HTTPMethod requestMethod, String requestUri) override {
        if (_method != HTTP_ANY && _method != requestMethod)
            return false;

        return _uri->canHandle(requestUri, pathArgs);
    }

    bool canUpload(String requestUri) override {
        if (!_ufn || !canHandle(HTTP_POST, requestUri))
            return false;

        return true;
    }

    bool handle(WebServer &server, HTTPMethod requestMethod, String requestUri) override {
        (void)server;
        if (!canHandle(requestMethod, requestUri))
            return false;

        _fn();
        return true;
    }

    void upload(WebServer &server, String requestUri, HTTPUpload &upload) override {
        (void)server;
        (void)upload;
        if (canUpload(requestUri))
            _ufn();
    }

  protected:
    WebServer::THandlerFunction _fn;
    WebServer::THandlerFunction _ufn;
    Uri *_uri;
    HTTPMethod _method;
};

class StaticRequestHandler : public RequestHandler {
  public:
    StaticRequestHandler(FS &fs, const char *path, const char *uri, const char *cache_header)
        : _fs(fs), _uri(uri), _path(path), _cache_header(cache_header) {
        File f  = fs.open(path);
        _isFile = (f && (!f.isDirectory()));
        log_v(
            "StaticRequestHandler: path=%s uri=%s isFile=%d, cache_header=%s\r\n",
            path,
            uri,
            _isFile,
            cache_header ? cache_header : ""
        ); // issue 5506 - cache_header can be nullptr
        _baseUriLength = _uri.length();
    }

    bool canHandle(HTTPMethod requestMethod, String requestUri) override {
        if (requestMethod != HTTP_GET)
            return false;

        if ((_isFile && requestUri != _uri) || !requestUri.startsWith(_uri))
            return false;

        return true;
    }

    bool handle(WebServer &server, HTTPMethod requestMethod, String requestUri) override {
        if (!canHandle(requestMethod, requestUri))
            return false;

        log_v("StaticRequestHandler::handle: request=%s _uri=%s\r\n", requestUri.c_str(), _uri.c_str());

        String path(_path);

        if (!_isFile) {
            // Base URI doesn't point to a file.
            // If a directory is requested, look for index file.
            if (requestUri.endsWith("/"))
                requestUri += "index.htm";

            // Append whatever follows this URI in request to get the file path.
            path += requestUri.substring(_baseUriLength);
        }
        log_v("StaticRequestHandler::handle: path=%s, isFile=%d\r\n", path.c_str(), _isFile);

        String contentType = getContentType(path);

        // look for gz file, only if the original specified path is not a gz.  So part only works to send gzip via
        // content encoding when a non compressed is asked for if you point the the path to gzip you will serve the gzip
        // as content type "application/x-gzip", not text or javascript etc...
        if (!path.endsWith(FPSTR(mimeTable[gz].endsWith)) && !_fs.exists(path)) {
            String pathWithGz = path + FPSTR(mimeTable[gz].endsWith);
            if (_fs.exists(pathWithGz))
                path += FPSTR(mimeTable[gz].endsWith);
        }

        File f = _fs.open(path, "r");
        if (!f || !f.available())
            return false;

        if (_cache_header.length() != 0)
            server.sendHeader("Cache-Control", _cache_header);

        server.streamFile(f, contentType);
        return true;
    }

    static String getContentType(const String &path) {
        char buff[sizeof(mimeTable[0].mimeType)];
        // Check all entries but last one for match, return if found
        for (size_t i = 0; i < sizeof(mimeTable) / sizeof(mimeTable[0]) - 1; i++) {
            strcpy_P(buff, mimeTable[i].endsWith);
            if (path.endsWith(buff)) {
                strcpy_P(buff, mimeTable[i].mimeType);
                return String(buff);
            }
        }
        // Fall-through and just return default type
        strcpy_P(buff, mimeTable[sizeof(mimeTable) / sizeof(mimeTable[0]) - 1].mimeType);
        return String(buff);
    }

  protected:
    FS _fs;
    String _uri;
    String _path;
    String _cache_header;
    bool _isFile;
    size_t _baseUriLength;
};