| 1 | #!/usr/bin/python |
| 2 | |
| 3 | # This program is quite incomplete. I might complete it with more |
| 4 | # features as I need them. It will probably never be entirely |
| 5 | # compliant with Apache's version due to architectural differences. |
| 6 | |
| 7 | import sys, os, time |
| 8 | |
| 9 | def htmlquote(text): |
| 10 | ret = "" |
| 11 | for c in text: |
| 12 | if c == '&': |
| 13 | ret += "&" |
| 14 | elif c == '<': |
| 15 | ret += "<" |
| 16 | elif c == '>': |
| 17 | ret += ">" |
| 18 | elif c == '"': |
| 19 | ret += """ |
| 20 | else: |
| 21 | ret += c |
| 22 | return ret |
| 23 | |
| 24 | def simpleerror(out, code, title, msg): |
| 25 | html = """<?xml version="1.0" encoding="US-ASCII"?> |
| 26 | <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> |
| 27 | <html xmlns="http://www.w3.org/1999/xhtml" lang="en-US" xml:lang="en-US"> |
| 28 | <head> |
| 29 | <title>%s</title> |
| 30 | </head> |
| 31 | <body> |
| 32 | <h1>%s</h1> |
| 33 | <p>%s</p> |
| 34 | </body> |
| 35 | </html> |
| 36 | """ % (title, title, htmlquote(msg)) |
| 37 | out.write("HTTP/1.1 %d %s\n" % (code, title)) |
| 38 | out.write("Content-Type: text/html\n") |
| 39 | out.write("Content-Length: %d\n" % len(html)) |
| 40 | out.write("\n") |
| 41 | out.write(html) |
| 42 | |
| 43 | ssivars = {} |
| 44 | |
| 45 | def parsecmd(line, p): |
| 46 | try: |
| 47 | while line[p].isspace(): p += 1 |
| 48 | cmd = "" |
| 49 | while not line[p].isspace(): |
| 50 | cmd += line[p] |
| 51 | p += 1 |
| 52 | pars = {} |
| 53 | while True: |
| 54 | while line[p].isspace(): p += 1 |
| 55 | if line[p:p + 3] == "-->": |
| 56 | return cmd, pars, p + 3 |
| 57 | key = "" |
| 58 | while line[p].isalnum(): |
| 59 | key += line[p] |
| 60 | p += 1 |
| 61 | if key == "": |
| 62 | return None, {}, p |
| 63 | while line[p].isspace(): p += 1 |
| 64 | if line[p] != '=': |
| 65 | continue |
| 66 | p += 1 |
| 67 | while line[p].isspace(): p += 1 |
| 68 | q = line[p] |
| 69 | if q != '"' and q != "'" and q != '`': |
| 70 | continue |
| 71 | val = "" |
| 72 | p += 1 |
| 73 | while line[p] != q: |
| 74 | val += line[p] |
| 75 | p += 1 |
| 76 | p += 1 |
| 77 | pars[key] = val |
| 78 | except IndexError: |
| 79 | return None, {}, len(line) |
| 80 | |
| 81 | class ssifile(object): |
| 82 | def __init__(self, s, url, path): |
| 83 | self.s = s |
| 84 | self.url = url |
| 85 | self.path = path |
| 86 | |
| 87 | def close(self): |
| 88 | self.s.close(); |
| 89 | |
| 90 | def initvars(self, vars): |
| 91 | now = time.time() |
| 92 | vars["DOCUMENT_NAME"] = os.path.basename(self.path) |
| 93 | vars["DATE_GMT"] = time.asctime(time.gmtime(now)) |
| 94 | vars["DATE_LOCAL"] = time.asctime(time.localtime(now)) |
| 95 | vars["LAST_MODIFIED"] = time.asctime(time.localtime(os.stat(self.path).st_mtime)) |
| 96 | |
| 97 | def includefile(self, path): |
| 98 | path = os.path.join(os.path.dirname(self.path), path) |
| 99 | try: |
| 100 | f = ssifile(open(path), url, path) |
| 101 | except Exception: |
| 102 | sys.stderr.write("serve-ssi: included file not found: %s\n" % path) |
| 103 | return |
| 104 | try: |
| 105 | f.process() |
| 106 | finally: |
| 107 | f.close |
| 108 | |
| 109 | def docmd(self, cmd, pars): |
| 110 | if cmd == "include": |
| 111 | if "file" in pars: |
| 112 | self.includefile(pars["file"]) |
| 113 | elif "virtual" in pars: |
| 114 | # XXX: For now, just include the file as-is. Change |
| 115 | # when necessary. |
| 116 | self.includefile(pars["virtual"]) |
| 117 | elif cmd == "echo": |
| 118 | enc = htmlquote |
| 119 | if "encoding" in pars: |
| 120 | if pars["encoding"] == "entity": |
| 121 | enc = htmlquote |
| 122 | if "var" in pars: |
| 123 | if pars["var"] in ssivars: |
| 124 | sys.stdout.write(enc(ssivars[pars["var"]])) |
| 125 | else: |
| 126 | sys.stderr.write("serve-ssi: unknown SSI command: %s\n" % cmd) |
| 127 | |
| 128 | def process(self): |
| 129 | for line in self.s: |
| 130 | p = 0 |
| 131 | while True: |
| 132 | p2 = line.find("<!--#", p) |
| 133 | if p2 < 0: |
| 134 | sys.stdout.write(line[p:]) |
| 135 | break |
| 136 | sys.stdout.write(line[p:p2]) |
| 137 | cmd, pars, p = parsecmd(line, p2 + 5) |
| 138 | if cmd is not None: |
| 139 | self.docmd(cmd, pars) |
| 140 | |
| 141 | if len(sys.argv) < 4: |
| 142 | sys.stderr.write("usage: serve-ssi METHOD URL REST\n") |
| 143 | sys.exit(1) |
| 144 | method, url, rest = sys.argv[1:] |
| 145 | path = os.getenv("REQ_X_ASH_FILE") |
| 146 | if path is None: |
| 147 | sys.stderr.write("serve-ssi: must be called with the X-Ash-File header\n") |
| 148 | sys.exit(1) |
| 149 | if rest != "": |
| 150 | simpleerror(sys.stdout, 404, "Not Found", "The resource specified by the URL does not exist.") |
| 151 | sys.exit(0) |
| 152 | |
| 153 | try: |
| 154 | f = ssifile(open(path), url, path) |
| 155 | except Exception: |
| 156 | simpleerror(sys.stdout, 500, "Server Error", "The server could not access its data.") |
| 157 | sys.exit(1) |
| 158 | try: |
| 159 | sys.stdout.write("HTTP/1.1 200 OK\n") |
| 160 | sys.stdout.write("Content-Type: text/html\n") |
| 161 | sys.stdout.write("\n") |
| 162 | f.initvars(ssivars) |
| 163 | f.process() |
| 164 | finally: |
| 165 | f.close() |
| 166 | |