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grammar.grammar.jj Maven / Gradle / Ivy
options
{
FORCE_LA_CHECK = true;
STATIC = false;
}
PARSER_BEGIN(NginxConfigParser)
package com.github.odiszapc.nginxparser.parser;
import com.github.odiszapc.nginxparser.*;
@SuppressWarnings("ConstantConditions")
public class NginxConfigParser
{
private boolean isDebug = false;
public void setDebug(boolean val) {
isDebug = val;
}
private void debug(String message) {
debug(message, false);
}
private void debugLn(String message) {
debug(message, true);
}
private void debug(String message, boolean appendLineEnding) {
if (isDebug) {
System.out.print(message);
if (appendLineEnding) System.out.println();
}
}
}
PARSER_END(NginxConfigParser)
SKIP :
{
" "
| "\t"
| "\r"
| "\n"
}
/* SEPARATORS */
TOKEN:
{
< LPAREN: "(" >
| < RPAREN: ")" >
| < LBRACE: "{" >
| < RBRACE: "}" >
| < SEMICOLON: ";">
}
TOKEN:
{
< IF: "if">
| < IF_BODY: (~[")"])+>
| < NUMBER: ["1"-"9"] (["0"-"9"])* >
| < STRING: (["0"-"9", "a"-"z", "A"-"Z",
"_", "/", ".", "-", ":", "=", "~",
"(", ")", "+", "?", "$", "&", "^", "*", "@", "\\", "|"])+>
|
< QUOTED_STRING:
"\""
(
(~["\"","\\"])
|
("\\"
( ["n","t","b","r","f","\\","'","\""]
| ["0"-"7"] ( ["0"-"7"] )?
| ["0"-"3"] ["0"-"7"] ["0"-"7"]
)
)
)*
"\""
>
| < SINGLE_QUOTED_STRING: "'" (~["'"])* "'" >
}
TOKEN:
{
>
| <#COMMENT_SIGN: "#">
| <#COMMENT_BODY: (~["\n", "\r"])*(["\n", "\r"])*>
}
/*
Main method
*/
NgxConfig parse():
{
NgxConfig config;
}
{
config=statements()
{
return config;
}
}
NgxConfig statements():
{
NgxConfig config = new NgxConfig();
NgxEntry curEntry;
}
{
(
(
LOOKAHEAD (4)
curEntry=param()
| curEntry=block()
| curEntry=comment()
)
{
config.addEntry(curEntry);
}
)*
{
return config;
}
}
/*
Block
Example:
http {
...
}
*/
NgxBlock block():
{
String blockName = "";
NgxBlock block = new NgxBlock();
NgxToken curToken;
NgxEntry curEntry;
}
{
curToken=id()
{
blockName += token.image+" ";
block.getTokens().add(curToken);
}
(
curToken=id()
{
blockName += token.image+" ";
block.getTokens().add(curToken);
}
)*
{
debugLn("BLOCK=" + blockName + "{");
}
(
(
LOOKAHEAD (4)
curEntry=param()
| curEntry=block()
| curEntry=comment()
| curEntry=if_block()
)
{
block.addEntry(curEntry);
}
)*
{
debugLn("}");
return block;
}
}
/*
"if" statement
Example:
if ($arg_val !~ '^\d+$') {
return 400;
break;
}
*/
NgxBlock if_block():
{
NgxIfBlock block = new NgxIfBlock();
NgxEntry curEntry = null;
}
{
{
debug(token.image + " ");
block.addValue(new NgxToken(token.image));
}
{
debug(token.image + " ");
block.addValue(new NgxToken(token.image));
}
{
debugLn(token.image);
}
(
(
LOOKAHEAD (4)
curEntry=param()
| curEntry=block()
| curEntry=comment()
)
{
block.addEntry(curEntry);
}
)*
{
debugLn(token.image);
return block;
}
}
/*
Single line parameter
Examples:
listen 80;
server_name localhost;
root /var/www;
index index.html index.htm;
array_map '[$array_it]' $list;
echo_exec /safe-memc?cmd=incr&key=$arg_key&val=$arg_val;
*/
NgxParam param():
{
NgxParam param = new NgxParam();
NgxToken curToken = null;
}
{
curToken=id()
{
debug("KEY=" + token.image +", VALUE=");
param.getTokens().add(curToken);
}
(
curToken=value()
{
debug(token.image + " | ");
param.getTokens().add(curToken);
}
)*
{
debugLn("");
}
{
return param;
}
}
/*
Comment
Example:
# Comment here
*/
NgxComment comment():
{
NgxComment comment;
}
{
{
debugLn("COMMENT=" + token.image);
return new NgxComment(token.image);
}
}
/*
Parameter/block names and/or values
Example:
# id occurs 6 times
gzip_types text/plain application/xml application/x-javascript text/css application/json;
*/
NgxToken id():
{
NgxToken val = null;
}
{
(
|
|
)
{
return new NgxToken(token.image);;
}
}
/*
Parameter values
*/
NgxToken value():
{
NgxToken val = null;
}
{
(
|
|
|
)
{
return new NgxToken(token.image);;
}
}