ContentLengthInterpreter.h

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/*
 * Copyright (C) 1996-2025 The Squid Software Foundation and contributors
 *
 * Squid software is distributed under GPLv2+ license and includes
 * contributions from numerous individuals and organizations.
 * Please see the COPYING and CONTRIBUTORS files for details.
 */
 
#ifndef SQUID_SRC_HTTP_CONTENTLENGTHINTERPRETER_H
#define SQUID_SRC_HTTP_CONTENTLENGTHINTERPRETER_H
 
#include "http/StatusCode.h"
 
class String;
 
namespace Http
{
 
class ContentLengthInterpreter
{
public:
    ContentLengthInterpreter();
 
    bool checkField(const String &field);
 
    void applyStatusCodeRules(const StatusCode code) {
        if (!prohibitedAndIgnored_ && ProhibitsContentLength(code))
            prohibitedAndIgnored_ = (code == scNoContent) ? "prohibited and ignored in the 204 response" :
                                    "prohibited and ignored the 1xx response";
    }
 
    // TODO: implement
    // void applyRequestMethodRules(const Http::MethodType method);
 
    void applyTrailerRules() {
        if (!prohibitedAndIgnored_)
            prohibitedAndIgnored_ = "prohibited in trailers";
    }
 
    const char *prohibitedAndIgnored() const { return prohibitedAndIgnored_; }
 
    int64_t value;
 
    /* for debugging (declared here to minimize padding) */
    const char *headerWideProblem; 
    const int debugLevel; 
 
    bool sawBad;
 
    bool needsSanitizing;
 
    bool sawGood;
 
protected:
    const char *findDigits(const char *prefix, const char *valueEnd) const;
    bool goodSuffix(const char *suffix, const char * const end) const;
    bool checkValue(const char *start, const int size);
    bool checkList(const String &list);
 
private:
    const char *prohibitedAndIgnored_;
};
 
} // namespace Http
 
#endif /* SQUID_SRC_HTTP_CONTENTLENGTHINTERPRETER_H */