add files from prior development
Jan Danielzick
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<!DOCTYPE html>
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<!-- This is an example file for PyHP (Python Hypertext Preprocessor).
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PyHP is intended to work similarly to PHP replacing the at times quirky
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PHP language with Python while still allowing for embedding in
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hypertext documents.
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-->
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<?py
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# Start of a python code block:
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# The block starts after the first line break after "<?py".
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# The indent of the first line of the block is assumed to be equivalent
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# to 0 (unless specified otherwise) in a normal python file to allow for
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# nice indented code blocks without messing up the Python syntax.
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# An example of specifying the indent is provided below.
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title = "PyHP - Python Hypertext Preprocessor"
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text1 = "An attempt at replacing PHP with Python. "
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text2 = "This is an example file that roughly describes the format."
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?>
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<!-- End of python block:
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The block ends at the last line break before "?>".
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Unless specified otherwise, the python indent of the text after a
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python block is assumed to be 0.
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An example of specifying the indent is provided below.
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-->
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<html>
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<head>
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<!-- insert variables just like in PHP -->
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<title> <?= title ?> </title>
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</head>
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<body>
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<h1> <?= title ?> </h1>
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<p> <?= text1, text2 ?> </p>
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<!-- Here is an example of an automatically populated table: -->
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<table>
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<?py
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hello_world = "Hello World!"
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for i in range(0,len(hello_world)+1):
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4 ?>
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<!-- python indent for the following hypertext is 4 spaces -->
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<tr>
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<td> <?= i ?> </td>
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<td> <?= hello_world ?> </td>
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</tr>
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<?py 4
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# start the python block with an indent of 4 spaces
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hello_world = hello_world[:-1]
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?>
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</table>
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</body>
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</html>
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@ -0,0 +1,17 @@
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#!/usr/bin/env bash
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if [ -z "$PYHP" ]; then
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PYHP=""$(dirname "$0")"/pyhp.py"
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fi
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PYH="$1"
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shift
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HYPERTEXT=$("$PYHP" "$PYH" | python3 - "$@")
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# check for headers, if present assume the pyh file is going to handle them
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if head -n1 <<< "$HYPERTEXT" | grep "[A-Za-z][A-Za-z0-9\-]*: "; then
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;
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else
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echo -ne "Content-type: text/html\\n\\n"
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fi
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#!/usr/bin/env python3
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# This is a naive implementation of the Python Hypertext preprocessor.
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# For example, we just assume that we can hold the entire code in memory.
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# Also, this is just the preprocessor, the resulting code will not be
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# executed.
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# Yes, the comments were here first and I wrote the code after writing them and then adjusted them to reality.
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import sys
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fd = open(sys.argv[1], "r")
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lines = fd.read().split("\n")
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fd.close()
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# start text
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output = "print(\"\"\""
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# while not end of file
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while len(lines)>0:
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# grab a line to process
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line = lines.pop(0)
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# iterate over line
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i=0
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while i < len(line):
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# attempt to grab the next few characters
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try:
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# variable(s) or code
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if line[i:i+3] in ["<?p", "<?="]:
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# end text
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output = output + "\"\"\""
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# variable(s)
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if line[i:i+3] == "<?=":
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output = output + " + str("
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# store variable list
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# (may span more than just one line)
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variable_list = ""
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i = i+3
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# walk until we either encounter a ?> or a line break
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while True:
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# if line break, attempt to go to next line
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if len(line[i:])<2:
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variable_list = variable_list + line[i:]
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i = -1
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try:
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line = lines.pop(0)
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except IndexError:
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print("Unexpected end of file: No closing ?> found.", file=sys.stderr)
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sys.exit(1)
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else:
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if line[i:i+2]=="?>":
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i = i+1
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break
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else:
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# add to variable list
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variable_list = variable_list + line[i]
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i = i+1
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# split at comma and add the variables
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output = output + ") + str(".join(variable_list.split(",")) + ") + "
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# code
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elif line[i:i+4] == "<?py":
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output = output + ", end=\"\")\n"
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# determine indent
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#default to 0
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indent = 0
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try:
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# any non whitespace characters left on line?
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if not line[i+4:].strip()=="":
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# attempt to use that as indent value
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indent = int(line[i+4:])
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# determining indent failed
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except ValueError:
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print("Invalid indent: \""+line[i+4:]+"\"\n" + line, file=sys.stderr)
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sys.exit(1)
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# attempt to check for end of code
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try:
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# grab code line
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line = lines.pop(0)
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# determine appropriate unindent length to get
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# "raw" code
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unindent_length = len(line)-len(line.lstrip())
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while not "?>" in line:
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# fix indent
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line = indent*" "+line[unindent_length:]
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# add code line
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output = output + line + "\n"
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# grab next code line
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line = lines.pop(0)
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# checking for end of code failed
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except IndexError:
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print("Unexpected end of file: No closing ?> found.", file=sys.stderr)
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sys.exit(1)
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# attempt to determine indent after end of code
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indent = 0
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try:
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if not line[:line.find("?>")].strip()=="":
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indent = int(line[:line.find("?>")])
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except ValueError:
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print("Invalid indent: \""+line[:line.find("?>")]+"\"\n" + line, file=sys.stderr)
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sys.exit(1)
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# add indent after end of code
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output = output + " "*indent + "print("
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# set i accordingly to add rest of line after code
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# block end
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i = line.find("?>")+2
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# assume accidental match
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else:
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# start text
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output = output + " + \""
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# add text
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output = output + line[i]
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# end text
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output = output + "\" + "
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# start text
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output = output + "\"\"\""
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else:
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# add text
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output = output + line[i]
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# handle last characters of line
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except IndexError:
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# add text
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output = output + line[i]
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i = i+1
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output = output + "\n"
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# end text
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output = output + "\"\"\", end=\"\")\n"
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print(output)
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