Add the option to automatically open content warnings

https://social.kernel.org/@monsieuricon

CMakeLists.txt

@@ -29,8 +29,8 @@ list(APPEND FLAGS -Werror -Wall -Wextra -Wshadow -Wpedantic -Wno-gnu-anonymous-s
 add_link_options(${FLAGS})
 
 
-add_executable(${PROJECT_NAME} main.cpp numberhelper.cpp config.cpp models.cpp client.cpp servehelper.cpp timeutils.cpp hiredis_wrapper.cpp
-    routes/home.cpp routes/css.cpp routes/user.cpp routes/status.cpp routes/tags.cpp routes/about.cpp
+add_executable(${PROJECT_NAME} main.cpp numberhelper.cpp config.cpp settings.cpp models.cpp client.cpp servehelper.cpp timeutils.cpp hiredis_wrapper.cpp
+    routes/home.cpp routes/css.cpp routes/user.cpp routes/status.cpp routes/tags.cpp routes/about.cpp routes/user_settings.cpp
     blankie/serializer.cpp blankie/escape.cpp)
 set_target_properties(${PROJECT_NAME}
     PROPERTIES

client.cpp

@@ -4,6 +4,7 @@
 
 #include "client.h"
 #include "models.h"
+#include "curlu_wrapper.h"
 #include "hiredis_wrapper.h"
 
 MastodonClient mastodon_client;
@@ -85,8 +86,13 @@ std::optional<Account> MastodonClient::get_account_by_username(std::string host,
         username.erase(username.size() - host.size() - 1);
     }
 
+    CurlUrl url;
+    url.set(CURLUPART_SCHEME, "https");
+    url.set(CURLUPART_HOST, host);
+    url.set(CURLUPART_PATH, "/api/v1/accounts/lookup");
+    url.set(CURLUPART_QUERY, "acct="s + url_encode(username));
     try {
-        Account account = this->_send_request("coyote:"s + host + ":@" + username, "https://"s + host + "/api/v1/accounts/lookup?acct=" + url_encode(username));
+        Account account = this->_send_request("coyote:"s + host + ":@" + username, url);
         account.same_server = host == account.server;
         return account;
     } catch (const MastodonException& e) {
@@ -102,7 +108,12 @@ std::vector<Post> MastodonClient::get_pinned_posts(std::string host, const std::
     using namespace std::string_literals;
     lowercase(host);
 
-    std::vector<Post> posts = this->_send_request("coyote:"s + host + ':' + account_id + ":pinned", "https://"s + host + "/api/v1/accounts/" + account_id + "/statuses?pinned=true");
+    CurlUrl url;
+    url.set(CURLUPART_SCHEME, "https");
+    url.set(CURLUPART_HOST, host);
+    url.set(CURLUPART_PATH, "/api/v1/accounts/"s + url_encode(account_id) + "/statuses");
+    url.set(CURLUPART_QUERY, "pinned=true");
+    std::vector<Post> posts = this->_send_request("coyote:"s + host + ':' + account_id + ":pinned", url);
 
     for (Post& post : posts) {
         handle_post_server(post, host);
@@ -113,22 +124,17 @@ std::vector<Post> MastodonClient::get_pinned_posts(std::string host, const std::
 
 std::vector<Post> MastodonClient::get_posts(const std::string& host, const std::string& account_id, PostSortingMethod sorting_method, std::optional<std::string> max_id) {
     using namespace std::string_literals;
-
     const char* sorting_parameters[3] = {"exclude_replies=true", "", "only_media=true"};
-    std::string query = sorting_parameters[sorting_method];
+
+    CurlUrl url;
+    url.set(CURLUPART_SCHEME, "https");
+    url.set(CURLUPART_HOST, host);
+    url.set(CURLUPART_PATH, "/api/v1/accounts/"s + url_encode(account_id) + "/statuses");
+    url.set(CURLUPART_QUERY, sorting_parameters[sorting_method]);
     if (max_id) {
-        if (!query.empty()) {
-            query += '&';
-        }
-        query += "max_id=";
-        query += std::move(*max_id);
+        url.set(CURLUPART_QUERY, "max_id="s + std::move(*max_id), CURLU_URLENCODE | CURLU_APPENDQUERY);
     }
 
-    std::string url = "https://"s + host + "/api/v1/accounts/" + account_id + "/statuses";
-    if (!query.empty()) {
-        url += '?';
-        url += query;
-    }
     std::vector<Post> posts = this->_send_request(std::nullopt, url);
 
     for (Post& post : posts) {
@@ -138,11 +144,15 @@ std::vector<Post> MastodonClient::get_posts(const std::string& host, const std::
     return posts;
 }
 
-std::optional<Post> MastodonClient::get_post(const std::string& host, const std::string& id) {
+std::optional<Post> MastodonClient::get_post(const std::string& host, std::string id) {
     using namespace std::string_literals;
 
+    CurlUrl url;
+    url.set(CURLUPART_SCHEME, "https");
+    url.set(CURLUPART_HOST, host);
+    url.set(CURLUPART_PATH, "/api/v1/statuses/"s + url_encode(std::move(id)));
     try {
-        Post post = this->_send_request(std::nullopt, "https://"s + host + "/api/v1/statuses/" + id);
+        Post post = this->_send_request(std::nullopt, url);
         handle_post_server(post, host);
         return post;
     } catch (const MastodonException& e) {
@@ -154,10 +164,14 @@ std::optional<Post> MastodonClient::get_post(const std::string& host, const std:
     }
 }
 
-PostContext MastodonClient::get_post_context(const std::string& host, const std::string& id) {
+PostContext MastodonClient::get_post_context(const std::string& host, std::string id) {
     using namespace std::string_literals;
 
-    PostContext context = this->_send_request(std::nullopt, "https://"s + host + "/api/v1/statuses/" + id + "/context");
+    CurlUrl url;
+    url.set(CURLUPART_SCHEME, "https");
+    url.set(CURLUPART_HOST, host);
+    url.set(CURLUPART_PATH, "/api/v1/statuses/"s + url_encode(std::move(id)) + "/context");
+    PostContext context = this->_send_request(std::nullopt, url);
 
     for (Post& post : context.ancestors) {
         handle_post_server(post, host);
@@ -172,10 +186,12 @@ PostContext MastodonClient::get_post_context(const std::string& host, const std:
 std::vector<Post> MastodonClient::get_tag_timeline(const std::string& host, const std::string& tag, std::optional<std::string> max_id) {
     using namespace std::string_literals;
 
-    std::string url = "https://"s + host + "/api/v1/timelines/tag/" + url_encode(tag);
+    CurlUrl url;
+    url.set(CURLUPART_SCHEME, "https");
+    url.set(CURLUPART_HOST, host);
+    url.set(CURLUPART_PATH, "/api/v1/timelines/tag/"s + url_encode(tag));
     if (max_id) {
-        url += "?max_id=";
-        url += std::move(*max_id);
+        url.set(CURLUPART_QUERY, "max_id="s + std::move(*max_id), CURLU_URLENCODE | CURLU_APPENDQUERY);
     }
 
     std::vector<Post> posts = this->_send_request(std::nullopt, url);
@@ -189,7 +205,11 @@ Instance MastodonClient::get_instance(std::string host) {
     using namespace std::string_literals;
     lowercase(host);
 
-    Instance instance = this->_send_request("coyote:"s + host + ":instance", "https://"s + host + "/api/v2/instance");
+    CurlUrl url;
+    url.set(CURLUPART_SCHEME, "https");
+    url.set(CURLUPART_HOST, host);
+    url.set(CURLUPART_PATH, "/api/v2/instance");
+    Instance instance = this->_send_request("coyote:"s + host + ":instance", url);
     instance.contact_account.same_server = instance.contact_account.server == host;
     return instance;
 }
@@ -198,7 +218,11 @@ blankie::html::HTMLString MastodonClient::get_extended_description(std::string h
     using namespace std::string_literals;
     lowercase(host);
 
-    nlohmann::json j = this->_send_request("coyote:"s + host + ":desc", "https://"s + host + "/api/v1/instance/extended_description");
+    CurlUrl url;
+    url.set(CURLUPART_SCHEME, "https");
+    url.set(CURLUPART_HOST, host);
+    url.set(CURLUPART_PATH, "/api/v1/instance/extended_description");
+    nlohmann::json j = this->_send_request("coyote:"s + host + ":desc", url);
     return blankie::html::HTMLString(j.at("content").get<std::string>());
 }
 
@@ -234,7 +258,7 @@ CURL* MastodonClient::_get_easy() {
     return curl;
 }
 
-nlohmann::json MastodonClient::_send_request(std::optional<std::string> cache_key, const std::string& url) {
+nlohmann::json MastodonClient::_send_request(std::optional<std::string> cache_key, const CurlUrl& url) {
     std::optional<std::string> cached;
     if (redis && cache_key && (cached = redis->get(*cache_key))) {
         return nlohmann::json::parse(std::move(*cached));
@@ -243,10 +267,11 @@ nlohmann::json MastodonClient::_send_request(std::optional<std::string> cache_ke
     std::string res;
     CURL* curl = this->_get_easy();
 
-    setopt(curl, CURLOPT_URL, url.c_str());
+    setopt(curl, CURLOPT_CURLU, url.get());
     setopt(curl, CURLOPT_WRITEFUNCTION, curl_write_cb);
     setopt(curl, CURLOPT_WRITEDATA, &res);
     CURLcode code = curl_easy_perform(curl);
+    setopt(curl, CURLOPT_CURLU, nullptr);
     if (code) {
         throw CurlException(code);
     }

client.h

@@ -8,6 +8,7 @@
 #include <nlohmann/json.hpp>
 
 #include "models.h"
+class CurlUrl; // forward declaration from curlu_wrapper.h
 
 class CurlException : public std::exception {
 public:
@@ -68,8 +69,8 @@ public:
     std::vector<Post> get_pinned_posts(std::string host, const std::string& account_id);
     std::vector<Post> get_posts(const std::string& host, const std::string& account_id, PostSortingMethod sorting_method, std::optional<std::string> max_id);
 
-    std::optional<Post> get_post(const std::string& host, const std::string& id);
-    PostContext get_post_context(const std::string& host, const std::string& id);
+    std::optional<Post> get_post(const std::string& host, std::string id);
+    PostContext get_post_context(const std::string& host, std::string id);
 
     std::vector<Post> get_tag_timeline(const std::string& host, const std::string& tag, std::optional<std::string> max_id);
 
@@ -78,7 +79,7 @@ public:
 
 private:
     CURL* _get_easy();
-    nlohmann::json _send_request(std::optional<std::string> cache_key, const std::string& url);
+    nlohmann::json _send_request(std::optional<std::string> cache_key, const CurlUrl& url);
     long _response_status_code();
 
     std::mutex _share_locks[CURL_LOCK_DATA_LAST];

curlu_wrapper.h

@@ -0,0 +1,77 @@
+#pragma once
+
+#include <cstdio>
+#include <string>
+#include <memory>
+#include <exception>
+#include <stdexcept>
+#include <curl/curl.h>
+
+class CurlUrlException : public std::exception {
+public:
+    CurlUrlException(CURLUcode code_) : code(code_) {
+#if !CURL_AT_LEAST_VERSION(7, 80, 0)
+        snprintf(this->_id_buf, 64, "curl url error %d", this->code);
+#endif
+    }
+
+    const char* what() const noexcept {
+#if CURL_AT_LEAST_VERSION(7, 80, 0)
+        return curl_url_strerror(this->code);
+#else
+        return this->_id_buf;
+#endif
+    }
+
+    CURLUcode code;
+
+private:
+#if !CURL_AT_LEAST_VERSION(7, 80, 0)
+    char _id_buf[64];
+#endif
+};
+
+using CurlStr = std::unique_ptr<char, decltype(&curl_free)>;
+class CurlUrl {
+public:
+    CurlUrl(const CurlUrl&) = delete;
+    CurlUrl& operator=(const CurlUrl&) = delete;
+
+    CurlUrl() {
+        this->_ptr = curl_url();
+        if (!this->_ptr) {
+            throw std::bad_alloc();
+        }
+    }
+    ~CurlUrl() {
+        curl_url_cleanup(this->_ptr);
+    }
+
+    constexpr CURLU* get() const noexcept {
+        return this->_ptr;
+    }
+
+    CurlStr get(CURLUPart part, unsigned int flags = 0) const {
+        char* content;
+        CURLUcode code = curl_url_get(this->_ptr, part, &content, flags);
+        if (code) {
+            throw CurlUrlException(code);
+        }
+
+        return CurlStr(content, curl_free);
+    }
+
+    void set(CURLUPart part, const char* content, unsigned int flags = 0) {
+        CURLUcode code = curl_url_set(this->_ptr, part, content, flags);
+        if (code) {
+            throw CurlUrlException(code);
+        }
+    }
+
+    void set(CURLUPart part, const std::string& content, unsigned int flags = 0) {
+        this->set(part, content.c_str(), flags);
+    }
+
+private:
+    CURLU* _ptr;
+};

main.cpp

@@ -40,16 +40,20 @@ int main(int argc, char** argv) {
     atexit(MastodonClient::cleanup);
 
     httplib::Server server;
+    server.set_payload_max_length(8192);
 
     server.Get("/", home_route);
     server.Get("/style.css", css_route);
+    server.Get("/settings", user_settings_route);
+    server.Post("/settings", user_settings_route);
+
     server.Get("/(" DOMAIN_RE ")/@(" ACCT_RE ")(|/with_replies|/media)", user_route);
     server.Get("/(" DOMAIN_RE ")/users/(" ACCT_RE ")(|/with_replies|/media)", [](const httplib::Request& req, httplib::Response& res) {
         serve_redirect(req, res, get_origin(req) + '/' + req.matches.str(1) + "/@" + req.matches.str(2) + req.matches.str(3), true);
     });
 
-    server.Get("/(" DOMAIN_RE ")/@" ACCT_RE "/(\\d+)", status_route);
-    server.Get("/(" DOMAIN_RE ")/users/(" ACCT_RE ")/statuses/(\\d+)", [](const httplib::Request& req, httplib::Response& res) {
+    server.Get("/(" DOMAIN_RE ")/@" ACCT_RE "/([a-zA-Z0-9]+)", status_route);
+    server.Get("/(" DOMAIN_RE ")/users/(" ACCT_RE ")/statuses/([a-zA-Z0-9]+)", [](const httplib::Request& req, httplib::Response& res) {
         serve_redirect(req, res, get_origin(req) + '/' + req.matches.str(1) + "/@" + req.matches.str(2) + '/' + req.matches.str(3), true);
     });
 

models.cpp

@@ -19,7 +19,9 @@ void from_json(const json& j, Emoji& emoji) {
 void from_json(const json& j, AccountField& field) {
     j.at("name").get_to(field.name);
     field.value_html = j.at("value").get<std::string>();
-    if (j.at("verified_at").is_null()) {
+    // https://social.kernel.org/@monsieuricon/Ac6oYwtLhess6uil1c
+    // https://social.kernel.org/@monsieuricon/Ac8RXJRqxTfUrM1xQG
+    if (!j.contains("verified_at") || j["verified_at"].is_null()) {
         field.verified_at = -1;
     } else {
         field.verified_at = parse_rfc3339(j["verified_at"].get_ref<const std::string&>());
@@ -104,7 +106,8 @@ void from_json(const json& j, Post& post) {
     j.at("replies_count").get_to(post.replies_count);
     j.at("reblogs_count").get_to(post.reblogs_count);
     j.at("favourites_count").get_to(post.favorites_count);
-    if (!j.at("edited_at").is_null()) {
+    // https://social.kernel.org/@monsieuricon/Ac6oYwtLhess6uil1c
+    if (j.contains("edited_at") && !j["edited_at"].is_null()) {
         post.edited_at = parse_rfc3339(j["edited_at"].get_ref<const std::string&>());
     } else {
         post.edited_at = -1;
@@ -117,7 +120,8 @@ void from_json(const json& j, Post& post) {
     j.at("account").get_to(post.account);
     j.at("media_attachments").get_to(post.media_attachments);
     j.at("emojis").get_to(post.emojis);
-    if (!j.at("poll").is_null()) {
+    // https://social.kernel.org/@monsieuricon/Ac6oYwtLhess6uil1c
+    if (j.contains("poll") && !j["poll"].is_null()) {
         post.poll = j["poll"].get<Poll>();
     }
 }

routes/css.cpp

@@ -14,6 +14,10 @@ static const constexpr char css[] = R"EOF(
     --error-border-color: red;
     --error-text-color: white;
 
+    --success-background-color: green;
+    --success-border-color: lightgreen;
+    --success-text-color: white;
+
     --accent-color: #962AC3;
     --bright-accent-color: #DE6DE6;
 }
@@ -22,9 +26,11 @@ static const constexpr char css[] = R"EOF(
     margin: 0;
     padding: 0;
 }
-p, details {
+/* .quote-inline and display: block: workaround for vt.social/@lina?max_id=111463476293964258 */
+p, details, .quote-inline {
     margin-top: 1em;
     margin-bottom: 1em;
+    display: block;
 }
 ul, ol {
     margin: revert;
@@ -161,6 +167,20 @@ svg {
     padding: revert;
 }
 
+/* SUCCESS BOX */
+.success {
+    text-align: center;
+    background-color: var(--success-background-color);
+    color: var(--success-text-color);
+    border-style: solid;
+    border-color: var(--success-border-color);
+    margin-bottom: 0.5em;
+}
+.success * {
+    margin: revert;
+    padding: revert;
+}
+
 /* USER PAGE */
 .user_page-header {
     width: 100%;
@@ -250,6 +270,18 @@ svg {
     margin: revert;
     padding: revert;
 }
+
+/* USER SETTINGS PAGE */
+.user_settings_page-form {
+    display: inline;
+}
+.user_settings_page-form input[type=submit] {
+    margin-top: 0.5em;
+    padding: revert;
+}
+.user_settings_page-form .cancel {
+    margin-left: 0.25em;
+}
 )EOF";
 // one for \0, one for trailing newline
 #define CSS_LEN sizeof(css) / sizeof(css[0]) - 2

routes/home.cpp

@@ -8,6 +8,7 @@ void home_route(const httplib::Request& req, httplib::Response& res) {
             "their posts, posts themselves (and their context), posts with a certain hashtag, "
             "and instance details.",
         }),
+        Element("p", {Element("a", {{"href", get_origin(req) + "/settings"}}, {"Configure settings"})}),
         Element("h2", {"Example links"}),
         Element("ul", {
             Element("li", {Element("a", {{"href", get_origin(req) + "/vt.social/@lina"}}, {"Asahi Lina (朝日リナ) // nullptr::live"})}),

routes/routes.h

@@ -10,3 +10,4 @@ void user_route(const httplib::Request& req, httplib::Response& res);
 void status_route(const httplib::Request& req, httplib::Response& res);
 void tags_route(const httplib::Request& req, httplib::Response& res);
 void about_route(const httplib::Request& req, httplib::Response& res);
+void user_settings_route(const httplib::Request& req, httplib::Response& res);

routes/tags.cpp

@@ -11,11 +11,6 @@ void tags_route(const httplib::Request& req, httplib::Response& res) {
     std::optional<std::string> max_id;
     if (req.has_param("max_id")) {
         max_id = req.get_param_value("max_id");
-        if (max_id->empty() || max_id->find_first_not_of("0123456789") != std::string::npos) {
-            res.status = 400;
-            serve_error(req, res, "400: Bad Request", "Invalid max_id query paramter");
-            return;
-        }
     }
 
     std::vector<Post> posts;

routes/user.cpp

@@ -22,11 +22,6 @@ void user_route(const httplib::Request& req, httplib::Response& res) {
     std::optional<std::string> max_id;
     if (req.has_param("max_id")) {
         max_id = req.get_param_value("max_id");
-        if (max_id->empty() || max_id->find_first_not_of("0123456789") != std::string::npos) {
-            res.status = 400;
-            serve_error(req, res, "400: Bad Request", "Invalid max_id query paramter");
-            return;
-        }
     }
 
     std::optional<Account> account;
@@ -87,6 +82,14 @@ static inline PostSortingMethod get_sorting_method(const std::string& method) {
 
 
 static inline Element user_header(const httplib::Request& req, const std::string& server, const Account& account, PostSortingMethod sorting_method) {
+    blankie::html::HTMLString preprocessed_bio = preprocess_html(req, account.server, account.emojis, account.note_html);
+    // Workaround for https://social.kernel.org/@monsieuricon
+    if (preprocessed_bio.str.find("<p>") == std::string::npos) {
+        preprocessed_bio.str.reserve(preprocessed_bio.str.size() + 3 + 4);
+        preprocessed_bio.str.insert(0, "<p>");
+        preprocessed_bio.str.append("</p>");
+    }
+
     Element user_links("table", {{"class", "user_page-user_links"}}, {});
     user_links.nodes.reserve(account.fields.size());
     for (const AccountField& i : account.fields) {
@@ -118,7 +121,7 @@ static inline Element user_header(const httplib::Request& req, const std::string
         }),
 
         Element("div", {{"class", "user_page-user_description"}}, {
-            Element("div", {{"class", "user_page-user_bio"}}, {preprocess_html(req, account.server, account.emojis, account.note_html)}),
+            Element("div", {{"class", "user_page-user_bio"}}, {std::move(preprocessed_bio)}),
 
             std::move(user_links),
         }),

routes/user_settings.cpp

@@ -0,0 +1,64 @@
+#include "routes.h"
+#include "../servehelper.h"
+#include "../settings.h"
+#include "../timeutils.h"
+#include "../curlu_wrapper.h"
+
+static void set_cookie(const httplib::Request& req, httplib::Response& res, const char* key, std::string_view value);
+
+
+void user_settings_route(const httplib::Request& req, httplib::Response& res) {
+    UserSettings settings;
+
+    if (req.method == "POST") {
+        for (const auto& i : req.params) {
+            settings.set(i.first, i.second);
+        }
+
+        set_cookie(req, res, "auto-open-cw", settings.auto_open_cw ? "true" : "false");
+    } else {
+        settings.load_from_cookies(req);
+    }
+
+    Element auto_open_cw_checkbox("input", {{"type", "checkbox"}, {"name", "auto-open-cw"}, {"value", "true"}}, {});
+    if (settings.auto_open_cw) {
+        auto_open_cw_checkbox.attributes.push_back({"checked", ""});
+    }
+
+    Element body("body", {
+        Element("form", {{"class", "user_settings_page-form"}, {"method", "post"}}, {
+            Element("label", {
+                std::move(auto_open_cw_checkbox),
+                " Automatically open Content Warnings",
+            }),
+
+            Element("br"),
+            Element("input", {{"type", "submit"}, {"value", "Save"}}, {}),
+        }),
+        Element("form", {{"class", "user_settings_page-form"}, {"method", "get"}, {"action", get_origin(req)}}, {
+            Element("input", {{"class", "cancel"}, {"type", "submit"}, {"value", "Cancel"}}, {}),
+        }),
+    });
+    if (req.method == "POST") {
+        body.nodes.insert(body.nodes.begin(), Element("div", {{"class", "success"}}, {
+            Element("h3", {"Settings saved!"}),
+        }));
+    }
+
+    serve(req, res, "User settings", std::move(body));
+}
+
+
+static void set_cookie(const httplib::Request& req, httplib::Response& res, const char* key, std::string_view value) {
+    CurlUrl origin;
+    origin.set(CURLUPART_URL, get_origin(req));
+
+    std::string header = std::string(key) + '=' + std::string(value)
+        + "; HttpOnly; SameSite=Strict; Domain=" + origin.get(CURLUPART_HOST).get() + "; Path=" + origin.get(CURLUPART_PATH).get()
+        + "; Expires=" + to_web_date(current_time() + 365 * 24 * 60 * 60);
+    if (strcmp(origin.get(CURLUPART_SCHEME).get(), "https") == 0) {
+        header += "; Secure";
+    }
+
+    res.set_header("Set-Cookie", header);
+}

servehelper.cpp

@@ -6,10 +6,12 @@
 
 #include "font_awesome.h"
 #include "config.h"
+#include "settings.h"
 #include "models.h"
 #include "timeutils.h"
 #include "servehelper.h"
 #include "lxb_wrapper.h"
+#include "curlu_wrapper.h"
 #include "routes/routes.h"
 #include "blankie/escape.h"
 
@@ -27,30 +29,6 @@ static Element serialize_post(const httplib::Request& req, const std::string& se
 static inline Element serialize_media(const Media& media);
 static inline Element serialize_poll(const httplib::Request& req, const Poll& poll);
 
-class CurlUrlException : public std::exception {
-public:
-    CurlUrlException(CURLUcode code_) : code(code_) {
-#if !CURL_AT_LEAST_VERSION(7, 80, 0)
-        snprintf(this->_id_buf, 64, "curl url error %d", this->code);
-#endif
-    }
-
-    const char* what() const noexcept {
-#if CURL_AT_LEAST_VERSION(7, 80, 0)
-        return curl_url_strerror(this->code);
-#else
-        return this->_id_buf;
-#endif
-    }
-
-    CURLUcode code;
-
-private:
-#if !CURL_AT_LEAST_VERSION(7, 80, 0)
-    char _id_buf[64];
-#endif
-};
-
 
 void serve(const httplib::Request& req, httplib::Response& res, std::string title, Element element, Nodes extra_head) {
     using namespace std::string_literals;
@@ -118,6 +96,21 @@ void serve_redirect(const httplib::Request& req, httplib::Response& res, std::st
 
 
 
+bool starts_with(const CurlUrl& url, const CurlUrl& base) {
+    if (strcmp(url.get(CURLUPART_SCHEME).get(), base.get(CURLUPART_SCHEME).get()) != 0) {
+        return false;
+    }
+    if (strcmp(url.get(CURLUPART_HOST).get(), base.get(CURLUPART_HOST).get()) != 0) {
+        return false;
+    }
+
+    CurlStr url_path = url.get(CURLUPART_PATH);
+    CurlStr base_path = base.get(CURLUPART_PATH);
+    size_t base_path_len = strlen(base_path.get());
+    return memcpy(url_path.get(), base_path.get(), base_path_len) == 0
+        && (url_path.get()[base_path_len] == '/' || url_path.get()[base_path_len] == '\0');
+}
+
 std::string get_origin(const httplib::Request& req) {
     if (req.has_header("X-Canonical-Origin")) {
         return req.get_header_value("X-Canonical-Origin");
@@ -139,43 +132,28 @@ std::string get_origin(const httplib::Request& req) {
 }
 
 std::string proxy_mastodon_url(const httplib::Request& req, const std::string& url_str) {
-    using CurlStr = std::unique_ptr<char, decltype(&curl_free)>;
+    CurlUrl url;
+    url.set(CURLUPART_URL, url_str.c_str());
 
-    std::unique_ptr<CURLU, decltype(&curl_url_cleanup)> url(curl_url(), curl_url_cleanup);
-    if (!url) {
-        throw std::bad_alloc();
-    }
+    std::string new_url = get_origin(req) + '/' + url.get(CURLUPART_HOST).get() + url.get(CURLUPART_PATH).get();
 
-    // in a block to avoid a (potential) gcc bug where it thinks the lambda below
-    // shadows `code`, even if i do `[&url](...) { ... }`
-    {
-        CURLUcode code = curl_url_set(url.get(), CURLUPART_URL, url_str.c_str(), 0);
-        if (code) {
-            throw CurlUrlException(code);
-        }
-    }
-
-    auto get_part = [&](CURLUPart part, CURLUcode ignore = CURLUE_OK) {
-        char* content = nullptr;
-        CURLUcode code = curl_url_get(url.get(), part, &content, 0);
-        if (code && code != ignore) {
-            throw CurlUrlException(code);
-        }
-        return CurlStr(content, curl_free);
-    };
-    CurlStr host = get_part(CURLUPART_HOST);
-    CurlStr path = get_part(CURLUPART_PATH);
-    CurlStr query = get_part(CURLUPART_QUERY, CURLUE_NO_QUERY);
-    CurlStr fragment = get_part(CURLUPART_FRAGMENT, CURLUE_NO_FRAGMENT);
-
-    std::string new_url = get_origin(req) + '/' + host.get() + path.get();
-    if (query) {
+    try {
+        CurlStr query = url.get(CURLUPART_QUERY);
         new_url += '?';
         new_url += query.get();
+    } catch (const CurlUrlException& e) {
+        if (e.code != CURLUE_NO_QUERY) {
+            throw;
         }
-    if (fragment) {
+    }
+    try {
+        CurlStr fragment = url.get(CURLUPART_FRAGMENT);
         new_url += '#';
         new_url += fragment.get();
+    } catch (const CurlUrlException& e) {
+        if (e.code != CURLUE_NO_FRAGMENT) {
+            throw;
+        }
     }
     return new_url;
 }
@@ -263,10 +241,14 @@ static inline void preprocess_link(const httplib::Request& req, const std::strin
     const lxb_char_t* cls_c = lxb_dom_element_class(element, &cls_c_len);
     std::string cls = cls_c ? std::string(reinterpret_cast<const char*>(cls_c), cls_c_len) : "";
 
-    std::string instance_url_base = "https://"s + domain_name;
+    CurlUrl href_url;
+    href_url.set(CURLUPART_URL, href);
+    CurlUrl instance_url_base;
+    instance_url_base.set(CURLUPART_SCHEME, "https");
+    instance_url_base.set(CURLUPART_HOST, domain_name);
     // .mention is used in note and posts
     // Instance base is used for link fields
-    if (std::regex_search(cls, mention_class_re) || href.starts_with(instance_url_base + '/') || href == instance_url_base) {
+    if (std::regex_search(cls, mention_class_re) || starts_with(href_url, instance_url_base)) {
         // Proxy this instance's URLs to Coyote
         href = proxy_mastodon_url(req, std::move(href));
 
@@ -387,7 +369,14 @@ static Element serialize_post(const httplib::Request& req, const std::string& se
         : "Created: "s + full_time(post.created_at) + "\nEdited: " + full_time(post.edited_at);
     const char* time_badge = post.edited_at < 0 ? "" : " (edited)";
 
-    Element contents("div", {{"class", "post-contents"}}, {preprocess_html(req, server, post.emojis, post.content)});
+    blankie::html::HTMLString preprocessed_html = preprocess_html(req, server, post.emojis, post.content);
+    // Workaround for https://vt.social/@a1ba@suya.place/110552480243348878#m
+    if (preprocessed_html.str.find("<p>") == std::string::npos) {
+        preprocessed_html.str.reserve(preprocessed_html.str.size() + 3 + 4);
+        preprocessed_html.str.insert(0, "<p>");
+        preprocessed_html.str.append("</p>");
+    }
+    Element contents("div", {{"class", "post-contents"}}, {std::move(preprocessed_html)});
 
     Element post_attachments("div", {{"class", "post-attachments"}}, {});
     post_attachments.nodes.reserve(post.media_attachments.size());
@@ -406,6 +395,9 @@ static Element serialize_post(const httplib::Request& req, const std::string& se
             Element("summary", {preprocess_html(req, post.emojis, std::move(spoiler_text))}),
             std::move(contents),
         });
+        if (UserSettings(req).auto_open_cw) {
+            contents.attributes.push_back({"open", ""});
+        }
     }
 
     Element div("div", {{"class", "post"}}, {

servehelper.h

@@ -6,6 +6,7 @@
 #include "blankie/serializer.h"
 struct Post; // forward declaration from models.h
 struct Emoji; // forward declaration from models.h
+class CurlUrl; // forward declaration from curlu_wrapper.h
 
 using Element = blankie::html::Element;
 using Node = blankie::html::Node;
@@ -16,6 +17,7 @@ void serve_error(const httplib::Request& req, httplib::Response& res,
         std::string title, std::optional<std::string> subtitle = std::nullopt, std::optional<std::string> info = std::nullopt);
 void serve_redirect(const httplib::Request& req, httplib::Response& res, std::string url, bool permanent = false);
 
+bool starts_with(const CurlUrl& url, const CurlUrl& base);
 std::string get_origin(const httplib::Request& req);
 std::string proxy_mastodon_url(const httplib::Request& req, const std::string& url_str);
 bool should_send_304(const httplib::Request& req, uint64_t hash);

settings.cpp

@@ -0,0 +1,75 @@
+#include <string>
+#include <stdexcept>
+#include "settings.h"
+
+static void set_settings(std::string_view str, const char* delimiter, UserSettings& settings);
+static inline bool lowercase_compare(std::string_view lhs, std::string_view rhs);
+static bool parse_bool(std::string_view value);
+
+
+void UserSettings::set(std::string_view key, std::string_view value) {
+    if (key == "auto-open-cw") {
+        this->auto_open_cw = parse_bool(value);
+    }
+}
+
+void UserSettings::load_from_cookies(const httplib::Request& req) {
+    for (const auto& i : req.headers) {
+        if (lowercase_compare(i.first, "cookie")) {
+            set_settings(i.second, "; ", *this);
+        }
+    }
+}
+
+
+static void set_settings(std::string_view str, const char* delimiter, UserSettings& settings) {
+    using namespace std::string_literals;
+    size_t offset = 0;
+    size_t new_offset = 0;
+    size_t delimiter_len = strlen(delimiter);
+
+    while (offset < str.size()) {
+        new_offset = str.find(delimiter, offset);
+
+        std::string_view item = str.substr(offset, new_offset != std::string_view::npos ? new_offset - offset : std::string_view::npos);
+        size_t equal_offset = item.find('=');
+        if (equal_offset == std::string_view::npos) {
+            throw std::invalid_argument("invalid user setting item: "s + std::string(item));
+        }
+        settings.set(item.substr(0, equal_offset), item.substr(equal_offset + 1));
+
+        if (new_offset == std::string_view::npos) {
+            break;
+        }
+        offset = new_offset + delimiter_len;
+    }
+}
+
+static inline bool lowercase_compare(std::string_view lhs, std::string_view rhs) {
+    if (lhs.size() != rhs.size()) {
+        return false;
+    }
+
+    auto lower = [](char c) {
+        return c >= 'A' && c <= 'Z' ? c - 'A' + 'a' : c;
+    };
+    for (size_t i = 0; i < lhs.size(); i++) {
+        if (lower(lhs[i]) != lower(rhs[i])) {
+            return false;
+        }
+    }
+
+    return true;
+}
+
+static bool parse_bool(std::string_view value) {
+    using namespace std::string_literals;
+
+    if (value == "true") {
+        return true;
+    } else if (value == "false") {
+        return false;
+    } else {
+        throw std::invalid_argument("unknown boolean value: "s + std::string(value));
+    }
+}

settings.h

@@ -0,0 +1,16 @@
+#pragma once
+
+#include <string_view>
+#include <httplib/httplib.h>
+
+struct UserSettings {
+    bool auto_open_cw = false;
+
+    UserSettings() = default;
+    UserSettings(const httplib::Request& req) {
+        this->load_from_cookies(req);
+    }
+
+    void set(std::string_view key, std::string_view value);
+    void load_from_cookies(const httplib::Request& req);
+};

timeutils.cpp

@@ -1,3 +1,4 @@
+#include <cstring>
 #include <system_error>
 
 #include "timeutils.h"
@@ -39,6 +40,19 @@ std::string to_rfc3339(time_t time) {
     return std::string(buf, len);
 }
 
+static const char* day_names[] = {"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"};
+static const char* month_names[] = {"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
+std::string to_web_date(time_t time) {
+    struct tm tm;
+    gmtime_r(&time, &tm);
+
+    char buf[32];
+    size_t len = strftime(buf, 32, "XXX, %d XXX %Y %H:%M:%S GMT", &tm);
+    memcpy(buf, day_names[tm.tm_wday], 3);
+    memcpy(buf + 3 + 2 + 2 + 1, month_names[tm.tm_mon], 3);
+    return std::string(buf, len);
+}
+
 std::string relative_time(time_t from, time_t to) {
     time_t diff = to - from;
 

timeutils.h

@@ -8,4 +8,5 @@ time_t current_time();
 std::string short_time(time_t time);
 std::string full_time(time_t time);
 std::string to_rfc3339(time_t time);
+std::string to_web_date(time_t time);
 std::string relative_time(time_t from, time_t to);