94 lines
3.1 KiB
C++
94 lines
3.1 KiB
C++
#include <regex>
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#include "config.h"
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#include "servehelper.h"
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void serve(const httplib::Request& req, httplib::Response& res, const Config& config, std::string title, Element element) {
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using namespace std::string_literals;
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std::string css_url = get_origin(req, config) + "/style.css";
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res.set_header("Content-Security-Policy", "default-src 'none'; style-src "s + css_url
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+ "; img-src https://s.pximg.net " + config.image_proxy_url.get_origin());
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Element html("html", {
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Element("head", {
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Element("meta", {{"charset", "utf-8"}}, {}),
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Element("title", {std::move(title)}),
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Element("link", {{"rel", "stylesheet"}, {"href", std::move(css_url)}}, {}),
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Element("meta", {{"name", "viewport"}, {"content", "width=device-width,initial-scale=1"}}, {})
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}),
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std::move(element)
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});
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res.set_content("<!DOCTYPE html>"s + html.serialize(), "text/html");
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}
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void serve_error(const httplib::Request& req, httplib::Response& res, const Config& config,
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std::string title, std::optional<std::string> subtitle, std::optional<std::string> info) {
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Element error_div("div", {{"class", "error"}}, {
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Element("h2", {title})
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});
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if (subtitle) {
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error_div.nodes.push_back(Element("p", {
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std::move(*subtitle)
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}));
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}
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if (info) {
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error_div.nodes.push_back(Element("pre", {
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Element("code", {std::move(*info)})
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}));
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}
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Element body("body", {std::move(error_div)});
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serve(req, res, config, std::move(title), std::move(body));
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}
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void serve_redirect(const httplib::Request& req, httplib::Response& res, const Config& config, std::string url) {
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using namespace std::string_literals;
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Element body("body", {
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"Redirecting to ",
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Element("a", {{"href", url}}, {url}),
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"…"
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});
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res.set_redirect(url);
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serve(req, res, config, "Redirecting to "s + std::move(url) + "…", std::move(body));
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}
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std::string get_origin(const httplib::Request& req, const Config& config) {
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if (req.has_header("X-Canonical-Origin")) {
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return req.get_header_value("X-Canonical-Origin");
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}
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std::string origin = "http://";
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if (req.has_header("Host")) {
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origin += req.get_header_value("Host");
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} else {
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origin += config.bind_host;
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if (config.bind_port != 80) {
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origin += ':' + std::to_string(config.bind_port);
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}
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}
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return origin;
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}
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std::string proxy_url(blankie::murl::Url base, blankie::murl::Url url) {
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if (!url.path.empty() && url.path[0] != '/') {
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base.path += '/';
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}
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base.path += blankie::murl::normalize_path(std::move(url.path));
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if (!base.query.empty() && !url.query.empty()) {
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base.query += '&';
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}
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base.query += std::move(url.query);
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base.fragment = std::move(url.fragment);
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return base.to_string();
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}
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std::string proxy_image_url(const Config& config, blankie::murl::Url url) {
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if (url.is_host_equal("s.pximg.net")) {
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return url.to_string();
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}
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return proxy_url(config.image_proxy_url, std::move(url));
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}
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