|
| 1 | +import gc |
| 2 | +import sys |
| 3 | + |
| 4 | +import uasyncio as asyncio |
| 5 | + |
| 6 | +_HEX = '0123456789ABCDEF' |
| 7 | + |
| 8 | +_HTML_PREFIX = b""" |
| 9 | +<html> |
| 10 | +<head><title>Minimal MicroPython Webserver</title></head> |
| 11 | +<body> |
| 12 | + <h1>Minimal MicroPython Webserver</h1> |
| 13 | + <pre> |
| 14 | +""" |
| 15 | +_HTML_SUFFIX = b""" |
| 16 | + </pre> |
| 17 | + <hr> |
| 18 | + <h2>POST test form:</h2> |
| 19 | + <form action="/test/post/" method="post"> |
| 20 | + <textarea name="text" rows="4" cols="20">POST text |
| 21 | +from textarea!</textarea> |
| 22 | + <p> |
| 23 | + <input type="checkbox" id="c1" name="c1" checked><label for="c1">c1</label> |
| 24 | + <input type="checkbox" id="c2" name="c2"><label for="c2">c2</label> |
| 25 | + </p> |
| 26 | + <input type="submit"> |
| 27 | + </form> |
| 28 | + <hr> |
| 29 | + <h2>GET test form:</h2> |
| 30 | + <form action="/test/get/" method="get"> |
| 31 | + <textarea name="text" rows="4" cols="20">GET text |
| 32 | +from textarea!</textarea> |
| 33 | + <p> |
| 34 | + <input type="checkbox" id="c1" name="c1"><label for="c1">c1</label> |
| 35 | + <input type="checkbox" id="c2" name="c2" checked><label for="c2">c2</label> |
| 36 | + </p> |
| 37 | + <input type="submit"> |
| 38 | + </form> |
| 39 | + <hr> |
| 40 | + <p> |
| 41 | +""" |
| 42 | +_HTML_FOOTER = """ |
| 43 | + </p> |
| 44 | +</body>""" |
| 45 | + |
| 46 | + |
| 47 | +def unquote(string): |
| 48 | + string = string.replace('+', ' ') |
| 49 | + if '%' not in string: |
| 50 | + return string |
| 51 | + |
| 52 | + bits = string.split('%') |
| 53 | + if len(bits) == 1: |
| 54 | + return string |
| 55 | + |
| 56 | + res = [bits[0]] |
| 57 | + for item in bits[1:]: |
| 58 | + if len(item) >= 2: |
| 59 | + a, b = item[:2].upper() |
| 60 | + if a in _HEX and b in _HEX: |
| 61 | + res.append(chr(int(a + b, 16))) |
| 62 | + res.append(item[2:]) |
| 63 | + continue |
| 64 | + |
| 65 | + res.append('%') |
| 66 | + res.append(item) |
| 67 | + |
| 68 | + return ''.join(res) |
| 69 | + |
| 70 | + |
| 71 | +def parse_qsl(qs): |
| 72 | + if qs is None: |
| 73 | + return () |
| 74 | + qs = str(qs) |
| 75 | + pairs = [s2 for s1 in qs.split('&') for s2 in s1.split(';')] |
| 76 | + res = [] |
| 77 | + for name_value in pairs: |
| 78 | + try: |
| 79 | + name, value = name_value.split('=', 1) |
| 80 | + except ValueError: |
| 81 | + res.append((unquote(name_value), '')) |
| 82 | + else: |
| 83 | + res.append((unquote(name), unquote(value))) |
| 84 | + return res |
| 85 | + |
| 86 | + |
| 87 | +def request_query2dict(qs): |
| 88 | + return dict(parse_qsl(qs)) |
| 89 | + |
| 90 | + |
| 91 | +class WebServer: |
| 92 | + async def parse_request(self, reader): |
| 93 | + method, url, http_version = (await reader.readline()).decode().strip().split() |
| 94 | + print(http_version) |
| 95 | + |
| 96 | + if '?' in url: |
| 97 | + url, querystring = url.split('?', 1) |
| 98 | + else: |
| 99 | + querystring = None |
| 100 | + |
| 101 | + # Consume all headers but use only content-length |
| 102 | + content_length = None |
| 103 | + while True: |
| 104 | + line = await reader.readline() |
| 105 | + if line == b'\r\n': |
| 106 | + break # header ends |
| 107 | + |
| 108 | + try: |
| 109 | + header, value = line.split(b':', 1) |
| 110 | + except ValueError: |
| 111 | + break |
| 112 | + |
| 113 | + value = value.strip() |
| 114 | + |
| 115 | + if header == b'Content-Length': |
| 116 | + content_length = int(value.decode()) |
| 117 | + |
| 118 | + print(header, value) |
| 119 | + |
| 120 | + print('content length:', content_length) |
| 121 | + |
| 122 | + # get body |
| 123 | + if content_length: |
| 124 | + body = await reader.read(content_length) |
| 125 | + else: |
| 126 | + body = None |
| 127 | + |
| 128 | + return method, url, querystring, body |
| 129 | + |
| 130 | + async def send_response(self, reader, writer): |
| 131 | + peername = writer.get_extra_info('peername') |
| 132 | + print('\nRequest from:', peername) |
| 133 | + await writer.awrite(b'HTTP/1.0 200 OK\r\n') |
| 134 | + await writer.awrite(b'Content-type: text/html; charset=utf-8\r\n\r\n') |
| 135 | + |
| 136 | + await writer.awrite(_HTML_PREFIX) |
| 137 | + |
| 138 | + await writer.awrite(b'Your IP: %s port:%s\n' % peername) |
| 139 | + |
| 140 | + await writer.awrite(b'\n') |
| 141 | + |
| 142 | + method, url, querystring, body = await self.parse_request(reader) |
| 143 | + |
| 144 | + await writer.awrite(b'Method: %s\n' % method) |
| 145 | + await writer.awrite(b'URL: %s\n' % url) |
| 146 | + await writer.awrite(b'querystring: %s\n' % querystring) |
| 147 | + await writer.awrite(b'parsed querystring: %s\n' % request_query2dict(querystring)) |
| 148 | + await writer.awrite(b'body: %s\n' % body) |
| 149 | + await writer.awrite(b'parsed body: %s\n' % request_query2dict(body)) |
| 150 | + |
| 151 | + await writer.awrite(_HTML_SUFFIX) |
| 152 | + |
| 153 | + alloc = gc.mem_alloc() / 1024 |
| 154 | + free = gc.mem_free() / 1024 |
| 155 | + |
| 156 | + await writer.awrite( |
| 157 | + b'RAM total: {total:.2f} KB, used: {alloc:.2f} KB, free: {free:.2f} KB'.format( |
| 158 | + total=alloc + free, |
| 159 | + alloc=alloc, |
| 160 | + free=free |
| 161 | + ) |
| 162 | + ) |
| 163 | + |
| 164 | + await writer.awrite(_HTML_FOOTER) |
| 165 | + await writer.aclose() |
| 166 | + |
| 167 | + async def request_handler(self, reader, writer): |
| 168 | + await self.send_response(reader, writer) |
| 169 | + gc.collect() |
| 170 | + |
| 171 | + def run(self): |
| 172 | + loop = asyncio.get_event_loop() |
| 173 | + loop.create_task(asyncio.start_server(self.request_handler, '0.0.0.0', 80)) |
| 174 | + print('\nWeb server started...') |
| 175 | + loop.run_forever() |
| 176 | + |
| 177 | + |
| 178 | +def main(): |
| 179 | + from wifi import WiFi |
| 180 | + wifi = WiFi() |
| 181 | + if not wifi.is_connected: |
| 182 | + wifi.ensure_connection() |
| 183 | + del wifi |
| 184 | + del WiFi |
| 185 | + del sys.modules['wifi'] |
| 186 | + gc.collect() |
| 187 | + |
| 188 | + server = WebServer() |
| 189 | + server.run() |
| 190 | + |
| 191 | + |
| 192 | +if __name__ == '__main__': |
| 193 | + try: |
| 194 | + main() |
| 195 | + except Exception as e: |
| 196 | + sys.print_exception(e) |
| 197 | + |
| 198 | + print('Hard reset !') |
| 199 | + |
| 200 | + import machine |
| 201 | + machine.reset() |
| 202 | + |
| 203 | + import utime |
| 204 | + utime.sleep(1) |
| 205 | + |
| 206 | + print('sys.exit()') |
| 207 | + import sys |
| 208 | + sys.exit() |
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