Doing SQL (work in progress)

author: justanothercatgirl <sotov@twistea.su> 2025-03-27 12:52:11 +0300
committer: justanothercatgirl <sotov@twistea.su> 2025-03-27 12:52:11 +0300
commit: 82742d5d13dc7b0691a79c79f8e62782fcb16e10 (patch)
tree: 48d077549ed667d2a54171b82eb7608cb8edaf3e /src/endpoints.c
parent: 8542ec17d3df989f3df9fd03af7a447bf730dc13 (diff)
1 files changed, 195 insertions, 0 deletions
diff --git a/src/endpoints.c b/src/endpoints.c
new file mode 100644
index 0000000..990ef29
--- /dev/null
+++ b/src/endpoints.c
@@ -0,0 +1,195 @@
+#include <stdbool.h>
+#include <stdarg.h>
+#include <limits.h>
+
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+
+#include <microhttpd.h>
+
+#define CONTAINER_IMPLEMENTATION
+#define JACSON_IMPLEMENTATION
+#define JACSON_EXPORT_RSNPRINTF
+#include <jacson.h>
+
+#define COMMON_IMPLEMENTATION
+#include <common.h>
+	
+const char *const JSON_ERROR			= "{\"error\":\"%s\"}";
+const char *const HTML_ERROR			= "<!DOCTYPE html><html><body>Error: %s</body></html>";
+const char *const JSON_SERVER_ERROR		= "{\"error\":\"%s\",\"what\":\"%s\"}"; 
+const char *const HTML_SERVER_ERROR		= "<!DOCTYPE html><html><body>Error: %s<br>Server error message: <p style=\"font-style: monospace\">%s</p></body></html>"; 
+const char *const INSUFFICIENT_ARGUMENTS	= "insufficient arguments";
+const char *const INVALID_ARGUMENTS		= "invalid arguments";
+const char *const OCCUPIED			= "occupied";
+const char *const SERVER_ERRORMSG		= "server error";
+const char *const UNKNOWN			= "unknown";
+const char *const HTML_PROLOGUE			= "<!DOCTYPE html><html><head><meta charset=\"utf-8\"></head><body>";
+const char *const HTML_EPILOGUE			= "</html></body>";
+
+struct global_args {
+	enum {
+		GA_FMT_JSON = 0,
+		GA_FMT_HTML = 1
+	} format;
+};
+
+struct fmt_const {
+	const char *error, *server_error, *content_type;
+};
+static struct fmt_const fmts[] = {
+	[GA_FMT_JSON] = {JSON_ERROR, JSON_SERVER_ERROR, "application/json"}, 
+	[GA_FMT_HTML] = {HTML_ERROR, HTML_SERVER_ERROR, "text/html"}
+};
+
+// string builder
+struct sb {
+	char* str;
+	size_t sz;
+	size_t ln;
+};
+
+size_t sbprintf(struct sb* s, const char* fmt, ...) {
+	va_list l;
+	va_start(l, fmt);
+	return s->ln += __jacson_vrsnprintf(&s->str, &s->sz, s->ln, fmt, l);
+}
+
+enum MHD_Result arg_builder (void *cls, enum MHD_ValueKind kind, const char *key, const char *value) {
+	struct sb *html = cls;
+	html->ln += __jacson_rsnprintf(&html->str, &html->sz, html->ln, "<li><p style=\"font-style:monospace;\">%s: %s</p></li>", key, value);
+	return MHD_YES;
+}
+
+struct global_args parse_global_args(struct MHD_Connection *connection) {
+	const char* key, *val;
+	struct global_args ret = { .format = GA_FMT_JSON };
+	key = "format";
+	if ( (val = MHD_lookup_connection_value(connection, MHD_GET_ARGUMENT_KIND, key)) 
+		&& !strcmp(val, "html")) ret.format = GA_FMT_HTML;
+	return ret;
+}
+
+char *db_add_url(const char *url, const char *path) {
+	return "test";
+}
+
+bool db_del_url(const char *path) {
+	return false;
+}
+
+// dong: output parameter
+char *db_get_info(const char *path, long *dong) {
+	*dong = 0;
+	return NULL;
+}
+
+char *db_get_url(const char *path) {
+	return NULL;
+}
+
+// alphabet: 0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ
+// returns 0 if no conversion is available
+static inline char itoc(register unsigned long l) {
+#ifdef __GNUC__
+	char add[256] = {
+		[0 ... 9] = '0',
+		[10 ... 35] = 'a' - 10,
+		[36 ... 61] = 'A' - 10 - 26,
+	};
+	return (l < 62) * (l + add[l]);
+#else
+	if (l < 10) return '0' + l;
+	if (l < 10 + 26) return 'a' + l - 10;
+	if (l < 10 + 2 * 26) return 'A' + l - 10 - 26;
+	return '\0';
+#endif
+}
+// returns negative number if conversion not available
+static inline unsigned long ctoi(register char c) {
+#ifdef __GNUC__
+	char sub[127] = {
+		[0 ... '0'-1] = 128,
+		['0' ... '9'] = '0',
+		['A' ... 'Z'] = 'A' - 26 - 10,
+		['a' ... 'z'] = 'a' - 10,
+	};
+	return c - sub[c];
+#else
+	TODO;
+#endif
+}
+// buf must be at least 12 characters (11 for strnig and 1 for termination byte)
+// returns a pointer from which the string starts
+static char *itou(register unsigned long i, register char *buf) {
+	register ssize_t ind = 11;
+	buf[ind] = '\0';
+	buf[ind - 1] = '0';
+	while (ind >= 0 && i) {
+		buf[--ind] = itoc(i % 62);
+		i /= 62;
+	}
+	return buf + ind;
+}
+static unsigned long utoi(const char *s) {
+	register unsigned long result = 0;
+	while (*s) {
+		result *= 62;
+		result += ctoi(*s);
+		++s;
+	}
+	return result;
+}
+
+// index, path: /
+struct MHD_Response *ENDP_(struct MHD_Connection* connection, int *status) {
+	return get_from_file("www/index.html");
+}
+
+// path: /getargs
+struct MHD_Response *ENDP_getargs(struct MHD_Connection *connection, int *status) {
+	struct sb html = {calloc(64, 1), 63, 0};
+	html.ln += __jacson_rsnprintf(&html.str, &html.sz, html.ln, 
+		"<!DOCTYPE html><html><head><meta charset=\"utf-8\"></head><body><h3>List of arguments</h3><ol>");
+	MHD_get_connection_values(connection, MHD_GET_ARGUMENT_KIND, &arg_builder, &html);
+	html.ln += __jacson_rsnprintf(&html.str, &html.sz, html.ln, "</ol></body></html>");
+	const char *val = MHD_lookup_connection_value(connection, MHD_GET_ARGUMENT_KIND, "test");
+	if (val) fprintf(stderr, "test = %s\n", val);
+	fprintf(stderr, "test pointer = %p", val);
+	return MHD_create_response_from_buffer(html.ln, html.str, MHD_RESPMEM_MUST_FREE);
+}
+
+// API, path: /api/linkadd
+struct MHD_Response *ENDP_api_linkadd(struct MHD_Connection *connection, int *status) { 
+	const char *url = NULL, *path = NULL;
+	char *newurl;
+	struct sb resp = {malloc(64), 63, 0};
+	struct global_args glob = parse_global_args(connection);
+	struct MHD_Response *response;
+	if ((url = MHD_lookup_connection_value(connection, MHD_GET_ARGUMENT_KIND, "url")) == NULL || *url == '\0') {
+		*status = MHD_HTTP_BAD_REQUEST;
+		sbprintf(&resp, fmts[glob.format].error, INSUFFICIENT_ARGUMENTS);
+		goto exit;
+	}
+	path = MHD_lookup_connection_value(connection, MHD_GET_ARGUMENT_KIND, "try");
+	if ((newurl = db_add_url(url, path)) == NULL) {
+		*status = MHD_HTTP_INTERNAL_SERVER_ERROR;
+		sbprintf(&resp, fmts[glob.format].server_error, SERVER_ERRORMSG, "database write failed");
+		goto exit;
+	}
+	if (glob.format == GA_FMT_JSON) sbprintf(&resp, "{\"url\":\"%s\"}", newurl);
+	else sbprintf(&resp, "%sYour URL: <a href\"%s\">/%s</a>%s", HTML_PROLOGUE, newurl, newurl, HTML_EPILOGUE);
+exit:
+	response = MHD_create_response_from_buffer(resp.ln, resp.str, MHD_RESPMEM_MUST_FREE);
+	MHD_add_response_header(response, "Content-Type", fmts[glob.format].content_type);
+	return response;
+}
+
+// API, path: /api/linkdel
+struct MHD_Response *ENDP_api_linkdel(struct MHD_Connection *connection, int *status) { 
+	
+}
+
+// API, path: /api/linkget
+struct MHD_Response *ENDP_api_linkget(struct MHD_Connection *connection, int *status) { }
author	justanothercatgirl <sotov@twistea.su>	2025-03-27 12:52:11 +0300
committer	justanothercatgirl <sotov@twistea.su>	2025-03-27 12:52:11 +0300
commit	82742d5d13dc7b0691a79c79f8e62782fcb16e10 (patch)
tree	48d077549ed667d2a54171b82eb7608cb8edaf3e /src/endpoints.c
parent	8542ec17d3df989f3df9fd03af7a447bf730dc13 (diff)