From 00a89295817dd9dc1b29f1718e1efeaa57ea5900 Mon Sep 17 00:00:00 2001
From: default <nobody@localhost>
Date: Thu, 22 Sep 2022 10:15:24 +0200
Subject: [PATCH] New function webfinger_request() (incomplete).

---
 Makefile    |  2 +-
 snac.h      |  1 +
 webfinger.c | 46 +++++++++++++++++++++++++++++++++++++++++++++-
 3 files changed, 47 insertions(+), 2 deletions(-)

diff --git a/Makefile b/Makefile
index eec1008..3f72197 100644
--- a/Makefile
+++ b/Makefile
@@ -21,4 +21,4 @@ httpd.o: httpd.c xs.h xs_io.h xs_encdec.h xs_json.h xs_socket.h \
 main.o: main.c xs.h xs_encdec.h xs_json.h snac.h
 snac.o: snac.c xs.h xs_io.h xs_encdec.h xs_json.h xs_curl.h \
   xs_openssl.h xs_socket.h xs_httpd.h snac.h
-webfinger.o: webfinger.c xs.h xs_encdec.h xs_json.h snac.h
+webfinger.o: webfinger.c xs.h xs_encdec.h xs_json.h xs_curl.h snac.h
diff --git a/snac.h b/snac.h
index 238fcac..7cce8f2 100644
--- a/snac.h
+++ b/snac.h
@@ -70,5 +70,6 @@ d_char *http_signed_request(snac *snac, char *method, char *url,
 
 void httpd(void);
 
+void webfinger_request(char *qs, int *status, char **actor, char **user);
 void webfinger_get_handler(d_char *req, char *q_path, int *status,
                         char **body, int *b_size, char **ctype);
diff --git a/webfinger.c b/webfinger.c
index be89ea9..bcc5982 100644
--- a/webfinger.c
+++ b/webfinger.c
@@ -4,11 +4,55 @@
 #include "xs.h"
 #include "xs_encdec.h"
 #include "xs_json.h"
+#include "xs_curl.h"
 
 #include "snac.h"
 
+void webfinger_request(char *qs, int *status, char **actor, char **user)
+/* queries the webfinger for qs and fills the required fields */
+{
+    xs *payload = NULL;
+    int p_size = 0;
+    xs *url = NULL;
+    xs *headers = xs_dict_new();
+
+    if (xs_startswith(qs, "https:/" "/")) {
+        /* actor query: pick the host */
+        xs *s = xs_replace(qs, "https:/" "/", "");
+        xs *l = xs_split_n(s, "/", 1);
+
+        url = xs_fmt("https:/" "/%s/.well-known/webfinger?resource=%s",
+                xs_list_get(l, 0), qs);
+    }
+    else {
+        /* it's a user */
+        xs *s = xs_dup(qs);
+        xs *l;
+
+        if (xs_startswith(s, "@"))
+            s = xs_crop(s, 1, 0);
+
+        l = xs_split_n(s, "@", 1);
+
+        if (xs_list_len(l) == 2) {
+            url = xs_fmt("https:/" "/%s/.well-known/webfinger?resource:acct:%s",
+                xs_list_get(l, 1), qs);
+        }
+    }
+
+    if (url == NULL) {
+        *status = 400;
+        return;
+    }
+
+    headers = xs_dict_append(headers, "accept", "application/json");
+
+    xs_http_request("GET", url, headers, NULL, 0, status, &payload, &p_size);
+}
+
+
 void webfinger_get_handler(d_char *req, char *q_path, int *status,
-                        char **body, int *b_size, char **ctype)
+                           char **body, int *b_size, char **ctype)
 /* serves webfinger queries */
 {
     if (strcmp(q_path, "/.well-known/webfinger") != 0)