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-rw-r--r--plugins/weblog/weblog.cpp456
1 files changed, 0 insertions, 456 deletions
diff --git a/plugins/weblog/weblog.cpp b/plugins/weblog/weblog.cpp
deleted file mode 100644
index cc2be34..0000000
--- a/plugins/weblog/weblog.cpp
+++ /dev/null
@@ -1,456 +0,0 @@
-#include "weblog.h"
-
-#include "libreichwein/mime.h"
-#include "libreichwein/stringhelper.h"
-
-#include <boost/algorithm/string/predicate.hpp>
-#include <boost/algorithm/string/replace.hpp>
-#include <boost/property_tree/ptree.hpp>
-#include <boost/property_tree/xml_parser.hpp>
-
-#include <algorithm>
-#include <filesystem>
-#include <fstream>
-#include <iostream>
-#include <regex>
-#include <string>
-
-using namespace std::string_literals;
-namespace fs = std::filesystem;
-namespace pt = boost::property_tree;
-using namespace Reichwein::Mime;
-using namespace Reichwein::Stringhelper;
-
-namespace {
-
- const size_t number_of_articles_on_front_page {10};
- const std::string article_filename{"article.data"};
-
- // Used to return errors by generating response page and HTTP status code
- std::string HttpStatus(std::string status, std::string message, std::function<plugin_interface_setter_type>& SetResponseHeader)
- {
- SetResponseHeader("status", status);
- SetResponseHeader("content_type", "text/html");
- return status + " " + message;
- }
-
- std::string getFile(const fs::path& filename)
- {
- std::ifstream file(filename.string(), std::ios::in | std::ios::binary | std::ios::ate);
-
- if (file.is_open()) {
- std::ifstream::pos_type fileSize = file.tellg();
- file.seekg(0, std::ios::beg);
-
- std::string bytes(fileSize, ' ');
- file.read(reinterpret_cast<char*>(bytes.data()), fileSize);
-
- return bytes;
-
- } else {
- throw std::runtime_error("Opening "s + filename.string() + " for reading");
- }
- }
-
- bool is_index_page(std::string& rel_target)
- {
- return (rel_target.size() == 0 || rel_target == "/");
- }
-
- bool is_index_file(std::string& rel_target, fs::path& path)
- {
- // must be top-level file, recognized as mime_type()
- return rel_target.find("/") == rel_target.npos && mime_type(path.string()) != "application/text";
- }
-
- bool is_article_page(std::string& rel_target, fs::path& path)
- {
- return (rel_target.size() >= 2 && rel_target.back() == '/' && fs::is_directory(path));
- }
-
- bool is_article_file(std::string& rel_target, fs::path& path)
- {
- return (fs::is_regular_file(path) && path.filename().string() != article_filename);
- }
-
- struct ArticleInfo
- {
- fs::path path;
- std::string subject;
- std::string date;
- };
-
- // get article metadata from header lines
- std::unordered_map<std::string, std::string> getMetaData(fs::path path)
- {
- if (path.string().size() > 0 && path.string().back() == '/') {
- std::string s {path.string()};
- path = s.substr(0, s.size() - 1);
- }
- std::unordered_map<std::string, std::string> result;
-
- std::string pathname{path.filename().string()};
- // ISO date
- std::string date{pathname.substr(0, 4) + "-"s + pathname.substr(4, 2) + "-"s + pathname.substr(6, 2)};
-
- result["Date"] = date;
-
- fs::path filepath {path / article_filename};
-
- std::ifstream file(filepath.string(), std::ios::in);
-
- if (file.is_open()) {
- std::string line;
- while (!file.eof()) {
- std::getline(file, line);
- if (line.empty()) // found header end
- break;
- size_t pos {line.find(": ")};
- if (pos == line.npos) {
- std::cerr << "Warning: Found bad header line in " << filepath << ": " << line << std::endl;
- continue;
- }
- result[line.substr(0, pos)] = line.substr(pos + 2);
- }
- return result;
-
- } else {
- throw std::runtime_error("Opening "s + filepath.string() + " for reading");
- }
- }
-
- std::vector<ArticleInfo> getArticleList(fs::path& path, size_t page)
- {
- std::vector<ArticleInfo> result;
-
- for (auto& year_entry: fs::directory_iterator(path)) {
- std::string year_entry_filename{year_entry.path().filename().string()};
- if (fs::is_directory(year_entry)) {
- for (auto& entry: fs::directory_iterator(year_entry.path())) {
- auto metaData{getMetaData(entry.path())};
- result.emplace_back(ArticleInfo{entry.path(), metaData.at("Subject"), metaData.at("Date")});
- }
- }
- }
-
- size_t index0{std::min(number_of_articles_on_front_page * (page), result.size())};
- size_t index1{std::min(number_of_articles_on_front_page * (page + 1), result.size())};
- // sort backwards
- std::partial_sort(result.begin(), result.begin() + index1, result.end(), [](const ArticleInfo& a0, const ArticleInfo& a1){ return a0.path.string() > a1.path.string();});
-
- return {result.begin() + index0, result.begin() + index1};
- }
-
- std::string plainTextFromPTree(const pt::ptree& tree)
- {
- std::string result;
-
- for (auto child: tree) {
- if (child.first == "<xmltext>")
- result += child.second.data();
- else
- result += plainTextFromPTree(child.second);
- }
-
- return result;
- }
-
- // returns plain text of string (html xml elements removed)
- std::string plainTextFromHTML(const std::string& text)
- {
- pt::ptree tree;
-
- std::istringstream ss{text};
- pt::read_xml(ss, tree, pt::xml_parser::no_comments | pt::xml_parser::no_concat_text);
-
- return plainTextFromPTree(tree);
- }
-
- std::string verbatimText(std::string text)
- {
- boost::algorithm::replace_all(text, "<", "&lt;");
- boost::algorithm::replace_all(text, ">", "&gt;");
-
- return "<pre>"s + text + "</pre>";
- }
-
- std::regex re{"\\.[[:space:]\"]", std::regex::basic};
-
- // returns teaser of article in plain text
- std::string shortVersion(const fs::path& path)
- {
- std::string article {getFile(path / article_filename)};
- size_t pos0 {article.find("\n\n")};
- if (pos0 == article.npos)
- return "";
-
- article = "<file>" + article.substr(pos0 + 2) + "</file>";
-
- auto metaData{getMetaData(path)};
- auto it {metaData.find("Content-Type")};
-
- // convert html to plaintext, if tagged as such
- // default: text/html
- if (it == metaData.end() || it->second == "text/html")
- article = plainTextFromHTML(article);
-
- size_t pos{1000};
-
- std::smatch match;
- if (std::regex_search(article, match, re)) {
- pos = std::min(pos, static_cast<size_t>(match.position() + match.length()));
- }
-
- return article.substr(0, pos);
- }
-
- class HtmlPage
- {
- std::function<std::string(const std::string& key)>& mGetRequestParam;
- std::string mContents;
- std::string mHeader;
- const std::string mFooter;
-
- public:
- HtmlPage(std::function<std::string(const std::string& key)>& GetRequestParam,
- std::string s = ""s)
- : mGetRequestParam(GetRequestParam)
- , mContents(s)
- , mHeader("<!DOCTYPE html><html><head>"
- "<meta charset=\"utf-8\"/>"
- "<meta name=\"viewport\" content=\"width=device-width, initial-scale=1\">"
- "<title>" + GetRequestParam("WEBLOG_NAME") + "</title>"
- "<meta name=\"keywords\" content=\"" + GetRequestParam("WEBLOG_KEYWORDS") + "\"/>"
- "<link rel=\"shortcut icon\" href=\"" + mGetRequestParam("plugin_path") + "/favicon.ico\" type=\"image/x-icon\"/>"
- "<link rel=\"stylesheet\" type=\"text/css\" href=\"" + mGetRequestParam("plugin_path") + "/blog.css\"/>"
- "</head><body><div class=\"page\">")
- , mFooter("<br/><br/><br/><div class=\"impressum\"><a href=\"" + mGetRequestParam("plugin_path") + "/impressum.html\">Impressum, Datenschutzerklärung</a></div></div></body></html>")
- {
- }
-
- HtmlPage& operator+=(const std::string& s)
- {
- mContents += s;
- return *this;
- }
-
- operator std::string() const
- {
- return mHeader + mContents + mFooter;
- }
- };
-
- std::string generateIndexPage(fs::path& path,
- std::function<std::string(const std::string& key)>& GetRequestParam,
- std::function<plugin_interface_setter_type>& SetResponseHeader,
- size_t page)
- {
- try {
- if (page > std::numeric_limits<int>::max())
- throw std::runtime_error("Bad page index: "s + std::to_string(page));
-
- HtmlPage htmlPage{GetRequestParam, "<h1>"s + GetRequestParam("WEBLOG_NAME") + "</h1>"s};
-
- fs::path link{ GetRequestParam("plugin_path")};
-
- auto list{getArticleList(path, page)};
- if (list.empty())
- htmlPage += "(no articles found.)";
- else {
- for (const auto& article: list) {
- std::string linkstart{"<a href=\"" + (link / article.path.filename()).string() + "/\">"};
- std::string linkend{"</a>"};
- htmlPage += "<h2>"s + linkstart + article.subject + linkend + "</h2>"s;
- htmlPage += "<div class=\"date\">" + article.date + "</div>"s;
-
- auto sv{shortVersion(article.path)};
- if (sv.size()) {
- htmlPage += sv + " "s + linkstart + "more..." + linkend;
- }
- }
- htmlPage += "<br/><br/><br/>";
- if (page > 0)
- htmlPage += "<a href=\"?page="s + std::to_string(page - 1) + "\">&lt;&lt;newer</a> "s;
- htmlPage += "page "s + std::to_string(page + 1);
- if (list.size() == number_of_articles_on_front_page)
- htmlPage += " <a href=\"?page="s + std::to_string(page + 1) + "\">older&gt;&gt;</a>"s;
- htmlPage += "<br/>";
- }
- SetResponseHeader("cache_control", "no-store");
- return htmlPage;
- } catch (const std::exception& ex) {
- return HttpStatus("500", "Reading Index page: "s + ex.what(), SetResponseHeader);
- }
- }
-
- std::string generateArticlePage(fs::path& path,
- std::function<std::string(const std::string& key)>& GetRequestParam,
- std::function<plugin_interface_setter_type>& SetResponseHeader)
- {
- try {
- auto metaData{getMetaData(path)};
-
- std::string data { getFile(path / article_filename)};
-
- size_t pos {data.find("\n\n")};
- if (pos == data.npos)
- throw std::runtime_error("Error parsing article");
-
- data = data.substr(pos + 2);
-
- auto it {metaData.find("Content-Type")};
- if (it != metaData.end() && it->second == "text/plain")
- data = verbatimText(data);
-
- HtmlPage htmlPage{GetRequestParam, "<h1>"s + metaData.at("Subject") + "</h1>"
- "<div class=\"date\">" + metaData.at("Date") + "</div>"
- "<br/><br/>"s + data + "<br/>&squ;"};
-
- return htmlPage;
- } catch (const std::exception& ex) {
- return HttpStatus("500", "Reading Article: "s + ex.what(), SetResponseHeader);
- }
- }
-
- std::string generateStaticFile(fs::path& path, std::function<plugin_interface_setter_type>& SetResponseHeader)
- {
- try {
- SetResponseHeader("content_type", mime_type(path.string()));
- return getFile(path);
- } catch (const std::exception& ex) {
- return HttpStatus("500", "Reading Article file: "s + ex.what(), SetResponseHeader);
- }
- }
-
- std::string urlDecode(std::string s)
- {
- std::string result;
-
- size_t pos = 0;
- while (pos < s.size()) {
- char c {s[pos]};
- if (c == '+') {
- result += ' ';
- } else if (c == '%' && pos + 2 < s.size()) {
- try {
- int i = stoi(s.substr(pos + 1, 2), 0, 16);
- if (i < 0 || i > 255)
- return result;
-
- result += static_cast<char>(i);
- } catch (...) {
- return result;
- }
-
- pos += 2;
- } else {
- result += c;
- }
- pos++;
- }
-
- return result;
- }
-
- std::unordered_map<std::string, std::string> SplitQueryString(std::string& s)
- {
- std::unordered_map<std::string, std::string> result;
-
- size_t qpos = s.find('?');
- if (qpos != s.npos) {
- auto list {split(s.substr(qpos + 1), "&")};
- for (auto i: list) {
- size_t apos = i.find('=');
- if (apos != i.npos) {
- result[urlDecode(i.substr(0, apos))] = urlDecode(i.substr(apos + 1));
- }
- }
- }
-
- s = s.substr(0, qpos);
-
- return result;
- }
-
-} // anonymous namespace
-
-std::string weblog_plugin::name()
-{
- return "weblog";
-}
-
-weblog_plugin::weblog_plugin()
-{
- //std::cout << "Plugin constructor" << std::endl;
-}
-
-weblog_plugin::~weblog_plugin()
-{
- //std::cout << "Plugin destructor" << std::endl;
-}
-
-std::string weblog_plugin::generate_page(
- std::function<std::string(const std::string& key)>& GetServerParam,
- std::function<std::string(const std::string& key)>& GetRequestParam, // request including body (POST...)
- std::function<void(const std::string& key, const std::string& value)>& SetResponseHeader // to be added to result string
-)
-{
- try {
- // Make sure we can handle the method
- std::string method {GetRequestParam("method")};
- if (method != "GET" && method != "HEAD")
- return HttpStatus("400", "Unknown HTTP method", SetResponseHeader);
-
- // Request path must not contain "..".
- std::string rel_target{GetRequestParam("rel_target")};
- std::string target{GetRequestParam("target")};
- if (rel_target.find("..") != std::string::npos) {
- return HttpStatus("400", "Illegal request: "s + target, SetResponseHeader);
- }
-
- std::unordered_map<std::string, std::string> query { SplitQueryString(rel_target) };
-
- // Build the path to the requested file
- std::string doc_root{GetRequestParam("doc_root")};
- if (rel_target.size() >= 4 && std::all_of(rel_target.begin(), rel_target.begin() + 4, isdigit)) {
- rel_target = rel_target.substr(0, 4) + "/" + rel_target;
- }
- fs::path path {fs::path{doc_root} / rel_target};
- if (target.size() && target.back() != '/' && fs::is_directory(path)) {
- std::string location{GetRequestParam("location") + "/"s};
- SetResponseHeader("location", location);
- return HttpStatus("301", "Correcting directory path", SetResponseHeader);
- }
-
- SetResponseHeader("content_type", "text/html");
-
- size_t page {0};
- auto it {query.find("page")};
- if (it != query.end()) {
- try {
- page = stoul(it->second);
- } catch(...) {
- // ignore: keep default 0
- }
- }
-
- if (is_index_page(rel_target))
- return generateIndexPage(path, GetRequestParam, SetResponseHeader, page);
-
- if (is_article_page(rel_target, path))
- return generateArticlePage(path, GetRequestParam, SetResponseHeader);
-
- if (is_index_file(rel_target, path) || is_article_file(rel_target, path))
- return generateStaticFile(path, SetResponseHeader);
-
- return HttpStatus("404", "Bad path specification: "s + rel_target, SetResponseHeader);
-
- } catch (const std::exception& ex) {
- return HttpStatus("500", "Unknown Error: "s + ex.what(), SetResponseHeader);
- }
-}
-
-bool weblog_plugin::has_own_authentication()
-{
- return false;
-}
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