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/*
 * Copyright (C) 2004-2018 ZNC, see the NOTICE file for details.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef ZNC_HTTPSOCK_H
#define ZNC_HTTPSOCK_H

#include <znc/zncconfig.h>
#include <znc/Socket.h>
#include <znc/FileUtils.h>

class CModule;

class CHTTPSock : public CSocket {
  public:
    CHTTPSock(CModule* pMod, const CString& sURIPrefix);
    CHTTPSock(CModule* pMod, const CString& sURIPrefix,
              const CString& sHostname, unsigned short uPort,
              int iTimeout = 60);
    virtual ~CHTTPSock();

    // Csocket derived members
    void ReadData(const char* data, size_t len) override;
    void ReadLine(const CString& sData) override;
    void Connected() override;
    Csock* GetSockObj(const CString& sHost, unsigned short uPort) override = 0;
    // !Csocket derived members

    // Hooks
    virtual bool ForceLogin();
    virtual bool OnLogin(const CString& sUser, const CString& sPass,
                         bool bBasic);
    virtual void OnPageRequest(const CString& sURI) = 0;
    virtual bool PrintFile(const CString& sFileName, CString sContentType = "");
    // !Hooks

    void CheckPost();
    bool SentHeader() const;
    bool PrintHeader(off_t uContentLength, const CString& sContentType = "",
                     unsigned int uStatusId = 200,
                     const CString& sStatusMsg = "OK");
    void AddHeader(const CString& sName, const CString& sValue);
    void SetContentType(const CString& sContentType);

    bool PrintNotFound();
    bool Redirect(const CString& sURL);
    bool PrintErrorPage(unsigned int uStatusId, const CString& sStatusMsg,
                        const CString& sMessage);
    static void ParseParams(const CString& sParams,
                            std::map<CString, VCString>& msvsParams);
    void ParseURI();
    void GetPage();
    static CString GetDate(time_t tm = 0);
    CString GetRemoteIP() const override;

    // Cookies
    CString GetRequestCookie(const CString& sKey) const;
    bool SendCookie(const CString& sKey, const CString& sValue);
    // Cookies

    // Setters
    void SetDocRoot(const CString& s);
    void SetLoggedIn(bool b) { m_bLoggedIn = b; }
    // !Setters

    // Getters
    CString GetPath() const;
    bool IsLoggedIn() const { return m_bLoggedIn; }
    const CString& GetDocRoot() const;
    const CString& GetUser() const;
    const CString& GetPass() const;
    const CString& GetParamString() const;
    const CString& GetContentType() const;
    const CString& GetURI() const;
    const CString& GetURIPrefix() const;
    bool IsPost() const;
    // !Getters

    // Parameter access
    CString GetParam(const CString& sName, bool bPost = true,
                     const CString& sFilter = "\r\n") const;
    CString GetRawParam(const CString& sName, bool bPost = true) const;
    bool HasParam(const CString& sName, bool bPost = true) const;
    const std::map<CString, VCString>& GetParams(bool bPost = true) const;
    size_t GetParamValues(const CString& sName, VCString& vsRet,
                          bool bPost = true,
                          const CString& sFilter = "\r\n") const;
    size_t GetParamValues(const CString& sName, std::set<CString>& ssRet,
                          bool bPost = true,
                          const CString& sFilter = "\r\n") const;
    // !Parameter access
  private:
    static CString GetRawParam(const CString& sName,
                               const std::map<CString, VCString>& msvsParams);
    static CString GetParam(const CString& sName,
                            const std::map<CString, VCString>& msvsParams,
                            const CString& sFilter);
    static size_t GetParamValues(const CString& sName, VCString& vsRet,
                                 const std::map<CString, VCString>& msvsParams,
                                 const CString& sFilter);
    static size_t GetParamValues(const CString& sName, std::set<CString>& ssRet,
                                 const std::map<CString, VCString>& msvsParams,
                                 const CString& sFilter);

    void WriteFileUncompressed(CFile& File);
    void WriteFileGzipped(CFile& File);

  protected:
    void PrintPage(const CString& sPage);
    void Init();

    bool m_bSentHeader;
    bool m_bGotHeader;
    bool m_bLoggedIn;
    bool m_bPost;
    bool m_bDone;
    bool m_bBasicAuth;
    unsigned long m_uPostLen;
    CString m_sPostData;
    CString m_sURI;
    CString m_sUser;
    CString m_sPass;
    CString m_sContentType;
    CString m_sDocRoot;
    CString m_sForwardedIP;
    std::map<CString, VCString> m_msvsPOSTParams;
    std::map<CString, VCString> m_msvsGETParams;
    MCString m_msHeaders;
    bool m_bHTTP10Client;
    CString m_sIfNoneMatch;
    bool m_bAcceptGzip;
    MCString m_msRequestCookies;
    MCString m_msResponseCookies;
    CString m_sURIPrefix;
};

#endif  // !ZNC_HTTPSOCK_H

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