Fixed some parsing / tokenization problems (added support for more characters / whitespace within tuples.
Implemented perl driver (and sample .cgi) for toplevel.c's network server.
This commit is contained in:
Sears Russell
parent
4e4585b4c1
commit
c5a75a9102
6 changed files with 385 additions and 42 deletions
117
src/apps/referential/Referential.pm
Executable file
117
src/apps/referential/Referential.pm
Executable file
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@ -0,0 +1,117 @@
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#!/usr/bin/perl -w
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package Referential;
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use strict;
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use Expect;
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use IO::Socket::INET;
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use URI::Escape;
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sub new {
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my $class = shift;
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my %self;
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$self{port} = shift;
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$self{host} = shift || "localhost";
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$self{log} = 1;
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$self{socket} = IO::Socket::INET->new(PeerAddr => $self{host},
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PeerPort => $self{port},
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Proto => "tcp",
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Type => SOCK_STREAM)
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or die "Couldn't connect to $self{host}:$self{port} : $!\n";
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$self{exp} = Expect->exp_init($self{socket});
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$self{exp}->raw_pty(1);
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my @prompt;
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push @prompt, '-re', '.*\>\s*';
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my $patidx = $self{exp}->expect(10, @prompt);
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if(!defined($patidx)) {
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die "Didn't get prompt\n";
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}
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return bless \%self, $class;
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}
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sub escape {
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my $self = shift;
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my $s = shift;
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return uri_escape($s, "^A-Za-z0-9\-_.!~'");
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}
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sub unescape {
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my $self = shift;
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my $s = shift;
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return uri_unescape($s);
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}
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sub query {
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my $self = shift;
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my $q = shift;
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#warn "REFERENTIAL QUERY: query $q\n";
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$self->{exp}->send("query $q\n");
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my @pat;
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my @tpls;
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push @tpls, '-re', '^[A-Za-z0-9\-_.!~\'%.,\ ]+[^\r\n]';
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push @tpls, '-re', '.*\>\s*';
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my @tups;
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while(my $idx = $self->{exp}->expect(10, @tpls)) {
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if($idx==1) {
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my $match = $self->{exp}->exp_match();
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chomp $match;
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my @tok = split ",", $match;
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my @tok2;
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for(my $i = 0; $i < @tok; $i++) {
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push @tok2, $self->unescape($tok[$i]);
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}
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push @tups, \@tok2;
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} elsif($idx == 2) {
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last;
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}
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}
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return \@tups;
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}
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sub _cmd {
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my $self = shift;
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my $q = shift;
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my $m = shift;
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if($self->{log}) {
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my $d = `date`;
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chomp $d;
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warn "\n[$d] REFERENTIAL_CMD: $m $q\n";
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}
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$self->{exp}->send("$m $q\n");
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my @pats;
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push @pats, '-re', '.*\>\s*';
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my $idx = $self->{exp}->expect(10, @pats);
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if($idx != 1) {
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warn "No prompt?!?\n";
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return 0;
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}
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return 1;
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}
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sub insert {
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my $self = shift;
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my $q = shift;
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return _cmd($self, $q, "insert");
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}
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sub delete {
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my $self = shift;
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my $q = shift;
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return _cmd($self, $q, "delete");
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}
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sub close {
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my $self = shift;
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$self->{exp}->send("!exit\n");
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$self->{exp}->soft_close();
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}
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1;
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@ -40,13 +40,14 @@ static void ts_releaseLock(int xid, void *it) {
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char ** split(char * in, char ** freeme, int* count, char * delim) {
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*freeme = strdup(in);
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*count = 0;
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char * tok = strtok(*freeme, delim);
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char * strtoks;
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char * tok = strtok_r(*freeme, delim,&strtoks);
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char ** ret = 0;
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while(tok) {
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(*count)++;
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ret = realloc(ret, sizeof(char*) * *count);
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ret[(*count)-1] = tok;
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tok = strtok(NULL,delim);
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tok = strtok_r(NULL,delim,&strtoks);
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}
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ret = realloc(ret, sizeof(char*) * ((*count)+1));
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ret[*count]=0;
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@ -95,6 +96,48 @@ void tplFree(char ** tup) {
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free(tup);
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}
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int isWhitelistChar(char c) {
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return(c == ';'
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c == '/'
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c == '?'
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c == ':'
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c == '@'
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c == '&'
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c == '='
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c == '+'
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c == '$'
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c == '['
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c == ']'
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c == '-'
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c == '_'
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c == '.'
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c == '!'
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c == '~'
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c == '*'
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c == '\''
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c == '%'
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c == '\\');
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}
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lladdIterator_t* ReferentialAlgebra_OpenTableScanner(int xid, recordid catalog,
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char * tablename) {
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char * table;
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@ -222,6 +265,41 @@ lladdIterator_t* ReferentialAlgebra_Select(int xid, lladdIterator_t * it, char *
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return new_it;
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}
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char * strtokempt(char *str, const char * delim, char ** saveptr, int * extra) {
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char * ret;
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if(str) {
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*saveptr = str;
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}
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ret = *saveptr;
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if(!(**saveptr)) {
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if(*extra) {
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*extra = 0;
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return ret;
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} else {
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return 0;
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}
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}
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do {
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for(int i = 0; delim[i]; i++) {
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if(**saveptr == delim[i]) {
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// terminate returned string
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**saveptr = 0;
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// consume deliminator character from last time.
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(*saveptr)++;
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//printf("extra: %d\n",*extra);
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*extra = 1;
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return ret;
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}
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}
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// consume character we just looked at.
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(*saveptr)++;
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} while(**saveptr);
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// printf("extra: %d\n",*extra);
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*extra = 0;
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return ret;
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}
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static int matchPredicate(const char const * tup, char ** pred) {
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char * tupcpy = strdup(tup);
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int colcount = 0;
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@ -231,7 +309,9 @@ static int matchPredicate(const char const * tup, char ** pred) {
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char * ths;
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const char const * DELIM = ",";
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if((ths = strtok(tupcpy, DELIM))) {
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char * strtoks;
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int extra = 0;
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if((ths = strtokempt(tupcpy, DELIM,&strtoks,&extra))) {
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colcount++;
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if(colcount > predcount) {
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free(tupcpy);
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@ -241,7 +321,7 @@ static int matchPredicate(const char const * tup, char ** pred) {
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tok[colcount-1] = ths;
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}
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}
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while((ths = strtok(NULL, DELIM))) {
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while((ths = strtokempt(NULL, DELIM,&strtoks,&extra))) {
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colcount++;
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if(colcount > predcount) {
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free(tupcpy);
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@ -438,7 +518,7 @@ static int matchComparator(char ** tup1,
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while(pred[col] && match) {
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char * lhs_start = pred[col];
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char * lhs_end = lhs_start;
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while(isalnum(*lhs_end)) { lhs_end++; }
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while(isWhitelistChar(*lhs_end)||isalnum(*lhs_end)) { lhs_end++; }
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int lhs_len = lhs_end - lhs_start;
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char * lhs = calloc(lhs_len+1,sizeof(char));
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@ -447,7 +527,7 @@ static int matchComparator(char ** tup1,
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char * op_start = lhs_end;
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while(isblank(*op_start)) { op_start++; }
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char * op_end = op_start;
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while(!(isblank(*op_end) || isalnum(*op_end))) { op_end++; }
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while(!(isblank(*op_end) || isWhitelistChar(*lhs_end)||isalnum(*op_end))) { op_end++; }
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int op_len = op_end - op_start;
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char * op = calloc(op_len+1,sizeof(char));
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@ -456,7 +536,7 @@ static int matchComparator(char ** tup1,
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char * rhs_start = op_end;
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while(isblank(*rhs_start)) { rhs_start++; }
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char * rhs_end = rhs_start;
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while(isalnum(*rhs_end)) { rhs_end++; }
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while(isWhitelistChar(*lhs_end)||isalnum(*rhs_end)) { rhs_end++; }
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int rhs_len = rhs_end - rhs_start;
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char * rhs = calloc(rhs_len+1,sizeof(char));
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@ -644,26 +724,29 @@ void ReferentialAlgebra_init() {
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@return one of the above. If returns STRING, set *tok to be the new
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token. (*tok should be freed by caller in this case)
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*/
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int nextToken(char ** head, char ** tok);
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int nextToken(char ** head, char ** tok, int breakOnSpace);
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char** parseTuple(char ** head) {
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char **tok = calloc(1,sizeof(char*));;
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char * mytok;
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char ret = nextToken(head, &mytok);
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char ret = nextToken(head, &mytok,0);
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assert(ret == LBRACKET);
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int count = 0;
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while(1) {
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ret = nextToken(head, &mytok);
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ret = nextToken(head, &mytok,0);
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if(ret == RBRACKET) {
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break;
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}
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assert(ret == STRING);
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if(ret == COMMA) {
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tok = realloc(tok, sizeof(char*)*(count+1));
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tok[count] = 0;
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tok[count-1] = calloc(1,sizeof(char));
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} else if(ret == STRING) {
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count++;
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tok = realloc(tok, sizeof(char*)*(count+1));
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tok[count] = 0;
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tok[count-1] = mytok;
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ret = nextToken(head, &mytok);
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ret = nextToken(head, &mytok,0);
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if(ret == STRING) { free(mytok); }
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if(ret == RBRACKET) {
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break;
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@ -672,6 +755,10 @@ char** parseTuple(char ** head) {
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tplFree(tok);
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return 0;
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}
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} else {
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tplFree(tok);
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return 0;
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}
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}
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return tok;
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}
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@ -719,12 +806,17 @@ lladdIterator_t * parseExpression(int xid, recordid catalog,
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return 0;
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}
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char * foo;
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char ret = nextToken(head, &foo);
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assert(ret == RPAREN);
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char ret = nextToken(head, &foo,0);
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if(ret != RPAREN) {
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Titerator_close(xid,it);
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return 0;
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} else {
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return it;
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}
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} else {
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char * tablename;
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char ret = nextToken(head, &tablename);
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char ret = nextToken(head, &tablename,1);
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assert(ret == STRING);
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lladdIterator_t * it2 =
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ReferentialAlgebra_OpenTableScanner(xid, catalog, tablename);
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@ -740,7 +832,7 @@ lladdIterator_t * parseExpression(int xid, recordid catalog,
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abort();
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}
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int nextToken(char ** head, char ** tok) {
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int nextToken(char ** head, char ** tok, int breakOnSpace) {
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while(isblank(**head) && **head) { (*head)++; }
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switch(**head) {
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case LPAREN: {
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@ -770,10 +862,25 @@ int nextToken(char ** head, char ** tok) {
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default: {
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if(!**head) { return EOS; };
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char * first = *head;
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while(isalnum(**head)||**head=='*'||**head=='=') { (*head)++; }
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while(isalnum(**head)
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||isWhitelistChar(**head)
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||(**head==' '&&!breakOnSpace)) {
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(*head)++;
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}
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char * last = *head;
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*tok = calloc(1 + last - first, sizeof(char));
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strncpy(*tok, first, last - first); // The remaining byte is the null terminator.
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// The remaining byte is the null terminator
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strncpy(*tok, first, last - first);
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int i = (last-first)-1;
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int firstloop = 1;
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while((*tok)[i] == ' ') {
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(*tok)[i] = '\0';
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i++;
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if(firstloop) {
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(*head)--;
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firstloop = 0;
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}
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}
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return STRING;
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} break;
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}
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@ -6,15 +6,16 @@
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#include "algebra.h"
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int executeInsert(int xid, recordid tables, char * insert) {
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char * linecopy = strdup(insert+strlen("insert"));
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char * tbl = strtok(linecopy," ");
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char * tup = strtok(NULL,"\r\n");
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char * strtoks;
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char * tbl = strtok_r(linecopy," ",&strtoks);
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char * tup = strtok_r(NULL,"\r\n",&strtoks);
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if((!tbl) || (!tup)) {
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printf("parse error\n");
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return 0;
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}
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char * tupcopy = strdup(tup);
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char * key = strtok(tupcopy,",");
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char * trunctup = strtok(NULL,"\r\n");
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char * key = strtok_r(tupcopy,",",&strtoks);
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char * trunctup = strtok_r(NULL,"\r\n",&strtoks);
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char * table;
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if(!trunctup) {
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trunctup = "";
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@ -35,15 +36,16 @@ int executeInsert(int xid, recordid tables, char * insert) {
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}
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int executeDelete(int xid, recordid tables, char * delete) {
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char * linecopy = strdup(delete+strlen("delete"));
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char * tbl = strtok(linecopy," ");
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char * tup = strtok(NULL,"\r\n");
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char * strtoks;
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char * tbl = strtok_r(linecopy," ",&strtoks);
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char * tup = strtok_r(NULL,"\r\n",&strtoks);
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if((!tbl) || (!tup)) {
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printf("parse error\n");
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return 0;
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}
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char * table;
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char * tupcopy = strdup(tup);
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char * key = strtok(tupcopy,",");
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char * key = strtok_r(tupcopy,",",&strtoks);
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int sz = ThashLookup(xid, tables, (byte*)tbl, strlen(tbl)+1, (byte**)&table);
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if(sz == -1) {
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printf("Unknown table %s\n", tbl);
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82
src/apps/referential/survey.cgi
Executable file
82
src/apps/referential/survey.cgi
Executable file
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@ -0,0 +1,82 @@
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#!/usr/bin/perl -w
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use strict;
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use CGI qw/:standard/;
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use Referential;
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sub printResponse {
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my $t = shift;
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print "<p>$$t[0]: ".($$t[1]?'Yes':'No')."</p>\n";
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if(defined ($$t[2]) && $$t[2] =~ /\S/) {
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print "<b>Comment:</b><pre>\n".$$t[2]."</pre>";
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}
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}
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my $ref = new Referential("6667");
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my $cgi = new CGI;
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if(param('name')) {
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my $name = $ref->escape(param('name'));
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my $vote = $ref->escape(param('vote'));
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my $comments = $ref->escape(param('comments'));
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print header;
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print "\n\n<html><head><title>Survey repsonse completed</title></head></html>\n";
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print "<body><h1>Thanks!</h1>\n";
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my $tups = $ref->query("{s ($name,*,*) peeps}");
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if(defined $$tups[0][0]) {
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print "<h2>Found and deleted old response:</h2>";
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printResponse($$tups[0]);
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}
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$ref->insert("peeps $name,$vote,$comments");
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$tups = $ref->query("{s ($name,*,*) peeps}");
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if(defined $$tups[0][0]) {
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print "<h2>Recorded your response:</h2>";
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printResponse($$tups[0]);
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} else {
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print "query failed!\n";
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}
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||||
print "</body></html>";
|
||||
} elsif(param('secret') eq 'wellkept') {
|
||||
my $format = param("format") || "html";
|
||||
my $tups = $ref->query("peeps");
|
||||
if($format ne 'html') {
|
||||
print header('text/plain')."\n\nVote tabulation\n";
|
||||
foreach my $t (@{$tups}) {
|
||||
print "$$t[1],$$t[0]\n";
|
||||
}
|
||||
print "\n";
|
||||
} else {
|
||||
print header."\n\n<html><head><title>Responses</title></head><body><h1>Responses</h1>";
|
||||
foreach my $t (@{$tups}) {
|
||||
printResponse($t);
|
||||
}
|
||||
print "</body></html>";
|
||||
}
|
||||
} else {
|
||||
print header."\n\n".qq(
|
||||
<html><head><title>Survey</title></head><body>
|
||||
<h1>Survey</h1>
|
||||
<form>
|
||||
Name: <input type='text' name='name'/>
|
||||
<br>
|
||||
<p>Will you attend?</p>
|
||||
<input type="radio" name="vote" value="1">Yes</input>
|
||||
<br>
|
||||
<input type="radio" name="vote" value="0">No</input>
|
||||
<p>Comments:</p>
|
||||
<textarea name="comments" cols="72" rows="10">
|
||||
</textarea><br>
|
||||
<input type="submit" value="Submit">
|
||||
<br>
|
||||
</form>
|
||||
</body>
|
||||
</html>);
|
||||
}
|
||||
34
src/apps/referential/test.pl
Executable file
34
src/apps/referential/test.pl
Executable file
|
|
@ -0,0 +1,34 @@
|
|||
#!/usr/bin/perl -w
|
||||
use strict;
|
||||
|
||||
use Referential;
|
||||
|
||||
my $r = new Referential($ARGV[0]);
|
||||
|
||||
print "Connected...\n";
|
||||
|
||||
my $tups = $r->query("{s (foo,*,*,*) TABLES}");
|
||||
my @tups = @{$tups};
|
||||
|
||||
if(@tups != 1) {
|
||||
die("Expected one foo table, found ".(@tups+0));
|
||||
}
|
||||
|
||||
#print "test $tups[0][3]\n";
|
||||
$r->insert("foo a,b,c");
|
||||
$r->insert("foo b,c,d");
|
||||
$tups = $r->query("foo");
|
||||
|
||||
foreach my $t (@{$tups}) {
|
||||
print ((join ",",@{$t})."\n");
|
||||
}
|
||||
|
||||
$r->delete("foo b");
|
||||
$tups = $r->query("foo");
|
||||
|
||||
foreach my $t (@{$tups}) {
|
||||
print ((join ",",@{$t})."\n");
|
||||
}
|
||||
|
||||
$r->close();
|
||||
|
||||
|
|
@ -134,7 +134,8 @@ int openInterpreter(FILE * in, FILE * out, recordid hash) {
|
|||
if(!strncmp(line,"create",strlen("create"))) {
|
||||
|
||||
char * linecopy = strdup(line+strlen("create"));
|
||||
char * tablename = strtok(linecopy, " \r\n");
|
||||
char * strtoks;
|
||||
char * tablename = strtok_r(linecopy, " \r\n",&strtoks);
|
||||
size_t sz;
|
||||
byte* delme;
|
||||
|
||||
|
|
|
|||
Loading…
Reference in a new issue