pull gemini code into its own module

1 files changed, 112 insertions, 0 deletions

diff --git a/gemini.py b/gemini.py
new file mode 100644
index 0000000..c0d09c1
--- /dev/null
+++ b/gemini.py
@@ -0,0 +1,112 @@
+import socket
+import ssl
+
+def htmlescape(text):
+    return text.replace('<', '&lt;').replace('>', '&gt;')
+
+def gem2html(gem):
+    html = []
+    state = 'text'
+    blanklines = 0
+    for line in gem.split('\n'):
+        if line.startswith('```'):
+            if state == 'pre':
+                newstate = 'text'
+                blanklines = 0
+            else:
+                newstate = 'pre'
+        elif state == 'pre':
+            newstate = 'pre'
+        elif line.startswith('=>'):
+            newstate = 'links'
+        elif line.startswith('* '):
+            newstate = 'list'
+        else:
+            newstate = 'text'
+
+        if state != 'pre':
+            if len(line.strip()) == 0:
+                blanklines += 1
+                if blanklines > 1:
+                    html.append('<br/>')
+                continue
+            blanklines = 0
+
+        if state != newstate:
+            if state in ('links', 'list'):
+                html.append('</ul>')
+            elif state == 'pre':
+                html.append('</pre>')
+
+            if newstate in ('links', 'list'):
+                html.append('<ul>')
+            elif newstate == 'pre':
+                html.append('<pre>')
+        state = newstate
+
+        if line.startswith('```'):
+            pass
+        elif state == 'links':
+            tokens = line.split(None, 2)
+            if len(tokens) == 3:
+                _, url, text = tokens
+                html.append('<li><a href="{url}">{text}</a></li>'.format(url=url, text=text))
+            else:
+                _, url = tokens
+                html.append('<li><a href="{url}">{url}</a></li>'.format(url=url))
+        elif state == 'list':
+            html.append('<li>{}</li>'.format(line[2:]))
+        elif state == 'pre':
+            html.append(line)
+        else:
+            if line.startswith('###'):
+                html.append('<h3>{}</h3>'.format(line[3:].lstrip()))
+            elif line.startswith('##'):
+                html.append('<h2>{}</h2>'.format(line[2:].lstrip()))
+            elif line.startswith('#'):
+                html.append('<h1>{}</h1>'.format(line[1:].lstrip()))
+            else:
+                html.append('<p>{}</p>'.format(htmlescape(line)))
+    return '\n'.join(html)
+
+def absolute_url(base, url):
+    """
+    modifies `url` in place
+    """
+    if not url.scheme():
+        url.setScheme(base.scheme())
+    if not url.host():
+        url.setHost(base.host())
+    if not url.path().startswith('/'):
+        url.setPath(base.path().rsplit('/', 1)[0] + '/' + url.path())
+    if url.port() == -1:
+        url.setPort(1965)
+    return url
+
+def get(url):
+    if len(url.path()) == 0:
+        url.setPath('/')
+        return {
+            'status': '32',
+            'meta': url.toDisplayString(),
+        }
+    context = ssl.create_default_context()
+    context.check_hostname = False
+    context.verify_mode = ssl.CERT_NONE
+    with socket.create_connection((url.host(), url.port())) as sock:
+        with context.wrap_socket(sock, server_hostname=url.host()) as ssock:
+            ssock.sendall('gemini://{}{}\r\n'.format(url.host(), url.path()).encode('utf8'))
+            fp = ssock.makefile(mode='rb')
+            header = fp.readline(1027)
+            status, meta = header.decode('utf8').split(None, 1)
+            if status[0] != '2':
+                return {
+                    'status': status,
+                    'meta': meta.strip(),
+                }
+            body = fp.read()
+    return {
+        'status': status,
+        'meta': meta.strip(),
+        'body': body.decode('utf8'),
+    }