100 lines
2.9 KiB
C++
100 lines
2.9 KiB
C++
#include <xmpp/jid.hpp>
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#include <algorithm>
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#include <cstring>
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#include <map>
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#include <louloulibs.h>
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#ifdef LIBIDN_FOUND
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#include <stringprep.h>
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#endif
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#include <logger/logger.hpp>
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Jid::Jid(const std::string& jid)
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{
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std::string::size_type slash = jid.find('/');
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if (slash != std::string::npos)
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{
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this->resource = jid.substr(slash + 1);
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}
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std::string::size_type at = jid.find('@');
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if (at != std::string::npos && at < slash)
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{
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this->local = jid.substr(0, at);
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at++;
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}
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else
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at = 0;
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this->domain = jid.substr(at, slash - at);
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}
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static constexpr size_t max_jid_part_len = 1023;
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std::string jidprep(const std::string& original)
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{
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#ifdef LIBIDN_FOUND
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using CacheType = std::map<std::string, std::string>;
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static CacheType cache;
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std::pair<CacheType::iterator, bool> cached = cache.insert({original, {}});
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if (std::get<1>(cached) == false)
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{ // Insertion failed: the result is already in the cache, return it
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return std::get<0>(cached)->second;
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}
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const std::string error_msg("Failed to convert " + original + " into a valid JID:");
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Jid jid(original);
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char local[max_jid_part_len] = {};
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memcpy(local, jid.local.data(), std::min(max_jid_part_len, jid.local.size()));
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Stringprep_rc rc = static_cast<Stringprep_rc>(::stringprep(local, max_jid_part_len,
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static_cast<Stringprep_profile_flags>(0), stringprep_xmpp_nodeprep));
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if (rc != STRINGPREP_OK)
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{
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log_error(error_msg + stringprep_strerror(rc));
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return "";
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}
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char domain[max_jid_part_len] = {};
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memcpy(domain, jid.domain.data(), std::min(max_jid_part_len, jid.domain.size()));
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rc = static_cast<Stringprep_rc>(::stringprep(domain, max_jid_part_len,
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static_cast<Stringprep_profile_flags>(0), stringprep_nameprep));
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if (rc != STRINGPREP_OK)
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{
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log_error(error_msg + stringprep_strerror(rc));
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return "";
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}
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std::replace_if(std::begin(domain), domain + ::strlen(domain),
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[](const char c) -> bool
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{
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return !((c >= 'a' && c <= 'z') || c == '-' ||
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(c >= '0' && c <= '9') || c == '.');
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}, '-');
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// If there is no resource, stop here
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if (jid.resource.empty())
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{
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std::get<0>(cached)->second = std::string(local) + "@" + domain;
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return std::get<0>(cached)->second;
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}
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// Otherwise, also process the resource part
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char resource[max_jid_part_len] = {};
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memcpy(resource, jid.resource.data(), std::min(max_jid_part_len, jid.resource.size()));
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rc = static_cast<Stringprep_rc>(::stringprep(resource, max_jid_part_len,
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static_cast<Stringprep_profile_flags>(0), stringprep_xmpp_resourceprep));
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if (rc != STRINGPREP_OK)
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{
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log_error(error_msg + stringprep_strerror(rc));
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return "";
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}
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std::get<0>(cached)->second = std::string(local) + "@" + domain + "/" + resource;
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return std::get<0>(cached)->second;
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#else
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(void)original;
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return "";
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#endif
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}
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