diff -urN saku-3.7.3/shingetsu/gateway_cgi.py saku-3.7.3-csv/shingetsu/gateway_cgi.py
--- saku-3.7.3/shingetsu/gateway_cgi.py	2009-12-26 17:21:54.000000000 +0900
+++ saku-3.7.3-csv/shingetsu/gateway_cgi.py	2010-06-27 21:41:35.000000000 +0900
@@ -31,6 +31,7 @@
 import re
 import cgi
 import csv
+import json, yaml, bencode
 from time import time
 
 import config
@@ -93,7 +94,13 @@
         elif self.form.getfirst("cmd", "") == "new":
             self.jump_new_file()
         elif path.startswith("csv"):
-            self.print_csv(path)
+            self.print_api(path, "csv")
+        elif path.startswith("json"):
+            self.print_api(path, "json")
+        elif path.startswith("yaml"):
+            self.print_api(path, "yaml")
+        elif path.startswith("be"):
+            self.print_api(path, "be")
         elif re.search(r"^(thread)", path):
             m = re.search(r"^(thread)/?([^/]*)$", path)
             if m is None:
@@ -184,9 +191,9 @@
         cachelist = self.make_recent_cachelist()
         self.print_index_list(cachelist, "recent")
 
-    def print_csv(self, path):
-        """CSV output as API."""
-        found = re.search(r"^csv/([^/]+)/(.+)", path)
+    def print_api(self, path, api="csv"):
+        """CSV, JSON, etc... output as API."""
+        found = re.search(r"^%s/([^/]+)/(.+)" % api, path)
         if found:
             target, cols = found.groups()
         else:
@@ -206,9 +213,17 @@
         else:
             self.print404()
             return
-        self.stdout.write("Content-Type: text/comma-separated-values;" +
-                          " charset=UTF-8\n\n")
-        writer = csv.writer(self.stdout)
+        if api == "csv":
+            self.stdout.write("Content-Type: text/comma-separated-values;" +
+                              " charset=UTF-8\n\n")
+            writer = csv.writer(self.stdout)
+        elif api == "json":
+            self.stdout.write("Content-Type: application/json\n\n")
+        elif api == "yaml":
+            self.stdout.write("Content-Type: application/x-yaml\n\n")
+        elif api == "be":
+            self.stdout.write("Content-Type: application/x-bittorrent;" +
+                              " charset=UTF-8\n\n")
         for cache in cachelist:
             title = self.file_decode(cache.datfile)
             if cache.type in config.types:
@@ -218,36 +233,54 @@
             else:
                 type = ""
                 path = ""
-            row = []
+            row = {}
             for c in cols:
                 if c == "file":
-                    row.append(cache.datfile)
+                    row[c] = cache.datfile
                 elif c == "stamp":
-                    row.append(cache.valid_stamp)
+                    row[c] = cache.valid_stamp
                 elif c == "date":
-                    row.append(self.localtime(cache.valid_stamp))
+                    row[c] = self.localtime(cache.valid_stamp)
                 elif c == "path":
-                    row.append(path)
+                    row[c] = path
                 elif c == "uri":
                     if self.host and path:
-                        row.append("http://" + self.host + path)
+                        row[c] = "http://" + self.host + path
                     else:
-                        row.append("")
+                        row[c] = ""
                 elif c == "type":
-                    row.append(cache.type)
+                    row[c] = cache.type
                 elif c == "title":
-                    row.append(title)
+                    row[c] = title
                 elif c == "records":
-                    row.append(len(cache))
+                    row[c] = len(cache)
                 elif c == "size":
-                    row.append(cache.size)
+                    row[c] = cache.size
                 elif c == 'tag':
-                    row.append(str(cache.tags))
+                    if api == "csv":
+                        row[c] = str(cache.tags)
+                    else:
+                        row[c] = []
+                        for tags in cache.tags:
+                            row[c].append(str(tags))
                 elif c == 'sugtag':
-                    row.append(str(cache.sugtags))
-                else:
-                    row.append("")
-            writer.writerow(row)
+                    if api == "csv":
+                        row[c] = str(cache.sugtags)
+                    else:
+                        row[c] = []
+                        for sugtags in cache.sugtags:
+                            row[c].append(str(sugtags))
+            if api == "csv":
+                val = []
+                for c in cols:
+                    val.append(row[c])
+                writer.writerow(val)
+            elif api == "json":
+                self.stdout.write(json.dumps(row))
+            elif api == "yaml":
+                self.stdout.write(yaml.safe_dump(row))
+            elif api == "be":
+                self.stdout.write(bencode.bencode(row))
 
     def jump_new_file(self):
         if self.form.getfirst("link", "") == "":