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#pragma once
#include <library/cpp/iterator/iterate_values.h>
#include <util/generic/iterator_range.h>
#include <util/generic/map.h>
#include <util/generic/strbuf.h>
#include <util/generic/string.h>
#include <initializer_list>
class TCgiParameters: public TMultiMap<TString, TString> {
public:
TCgiParameters() = default;
explicit TCgiParameters(const TStringBuf cgiParamStr) {
Scan(cgiParamStr);
}
TCgiParameters(std::initializer_list<std::pair<TString, TString>> il);
void Flush() {
erase(begin(), end());
}
size_t EraseAll(const TStringBuf name);
size_t NumOfValues(const TStringBuf name) const noexcept {
return count(name);
}
TString operator()() const {
return Print();
}
void Scan(const TStringBuf cgiParStr, bool form = true);
void ScanAdd(const TStringBuf cgiParStr);
void ScanAddUnescaped(const TStringBuf cgiParStr);
void ScanAddAllUnescaped(const TStringBuf cgiParStr);
void ScanAddAll(const TStringBuf cgiParStr);
/// Returns the string representation of all the stored parameters
/**
* @note The returned string has format <name1>=<value1>&<name2>=<value2>&...
* @note Names and values in the returned string are CGI-escaped.
*/
TString Print() const;
char* Print(char* res) const;
Y_PURE_FUNCTION
size_t PrintSize() const noexcept;
/** The same as Print* except that RFC-3986 reserved characters are escaped.
* @param safe - set of characters to be skipped in escaping
*/
TString QuotedPrint(const char* safe = "/") const;
Y_PURE_FUNCTION
auto Range(const TStringBuf name) const noexcept {
return IterateValues(MakeIteratorRange(equal_range(name)));
}
Y_PURE_FUNCTION
const_iterator Find(const TStringBuf name, size_t numOfValue = 0) const noexcept;
Y_PURE_FUNCTION
bool Has(const TStringBuf name, const TStringBuf value) const noexcept;
Y_PURE_FUNCTION
bool Has(const TStringBuf name) const noexcept {
const auto pair = equal_range(name);
return pair.first != pair.second;
}
/// Returns value by name
/**
* @note The returned value is CGI-unescaped.
*/
Y_PURE_FUNCTION
const TString& Get(const TStringBuf name, size_t numOfValue = 0) const noexcept;
void InsertEscaped(const TStringBuf name, const TStringBuf value);
#if !defined(__GLIBCXX__)
template <typename TName, typename TValue>
inline void InsertUnescaped(TName&& name, TValue&& value) {
// TStringBuf use as TName or TValue is C++17 actually.
// There is no pair constructor available in C++14 when required type
// is not implicitly constructible from given type.
// But libc++ pair allows this with C++14.
emplace(std::forward<TName>(name), std::forward<TValue>(value));
}
#else
template <typename TName, typename TValue>
inline void InsertUnescaped(TName&& name, TValue&& value) {
emplace(TString(name), TString(value));
}
#endif
// replace all values for a given key with new values
template <typename TIter>
void ReplaceUnescaped(const TStringBuf key, TIter valuesBegin, const TIter valuesEnd);
void ReplaceUnescaped(const TStringBuf key, std::initializer_list<TStringBuf> values) {
ReplaceUnescaped(key, values.begin(), values.end());
}
void ReplaceUnescaped(const TStringBuf key, const TStringBuf value) {
ReplaceUnescaped(key, {value});
}
// join multiple values into a single one using a separator
// if val is a [possibly empty] non-NULL string, append it as well
void JoinUnescaped(const TStringBuf key, char sep, TStringBuf val = TStringBuf());
bool Erase(const TStringBuf name, size_t numOfValue = 0);
bool Erase(const TStringBuf name, const TStringBuf val);
bool ErasePattern(const TStringBuf name, const TStringBuf pat);
inline const char* FormField(const TStringBuf name, size_t numOfValue = 0) const {
const_iterator it = Find(name, numOfValue);
if (it == end()) {
return nullptr;
}
return it->second.data();
}
};
template <typename TIter>
void TCgiParameters::ReplaceUnescaped(const TStringBuf key, TIter valuesBegin, const TIter valuesEnd) {
const auto oldRange = equal_range(key);
auto current = oldRange.first;
// reuse as many existing nodes as possible (probably none)
for (; valuesBegin != valuesEnd && current != oldRange.second; ++valuesBegin, ++current) {
current->second = *valuesBegin;
}
// if there were more nodes than we need to insert then erase remaining ones
for (; current != oldRange.second; erase(current++)) {
}
// if there were less nodes than we need to insert then emplace the rest of the range
if (valuesBegin != valuesEnd) {
const TString keyStr = TString(key);
for (; valuesBegin != valuesEnd; ++valuesBegin) {
emplace_hint(oldRange.second, keyStr, TString(*valuesBegin));
}
}
}
/** TQuickCgiParam is a faster non-editable version of TCgiParameters.
* Care should be taken when replacing:
* - note that the result of Get() is invalidated when TQuickCgiParam object is destroyed.
*/
class TQuickCgiParam: public TMultiMap<TStringBuf, TStringBuf> {
public:
TQuickCgiParam() = default;
explicit TQuickCgiParam(const TStringBuf cgiParamStr);
Y_PURE_FUNCTION
bool Has(const TStringBuf name, const TStringBuf value) const noexcept;
Y_PURE_FUNCTION
bool Has(const TStringBuf name) const noexcept {
const auto pair = equal_range(name);
return pair.first != pair.second;
}
Y_PURE_FUNCTION
const TStringBuf& Get(const TStringBuf name, size_t numOfValue = 0) const noexcept;
private:
TString UnescapeBuf;
};
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