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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "transformer.h"
#include <log4cxx/file.h>
#include <log4cxx/helpers/transcoder.h>
#include <apr_thread_proc.h>
#include <apr_pools.h>
#include <apr_file_io.h>
#include <apr_strings.h>
#include <assert.h>
#include <iostream>
using namespace log4cxx;
using namespace log4cxx::helpers;
#if !defined(APR_FOPEN_READ)
#define APR_FOPEN_READ APR_READ
#define APR_FOPEN_CREATE APR_CREATE
#define APR_FOPEN_WRITE APR_WRITE
#define APR_FOPEN_TRUNCATE APR_TRUNCATE
#define APR_FOPEN_APPEND APR_APPEND
#endif
void Transformer::transform(const File& in, const File& out,
const std::vector<Filter *>& filters)
{
log4cxx::Filter::PatternList patterns;
for(std::vector<Filter*>::const_iterator iter = filters.begin();
iter != filters.end();
iter++) {
const log4cxx::Filter::PatternList& thesePatterns = (*iter)->getPatterns();
for (log4cxx::Filter::PatternList::const_iterator pattern = thesePatterns.begin();
pattern != thesePatterns.end();
pattern++) {
patterns.push_back(*pattern);
}
}
transform(in, out, patterns);
}
void Transformer::transform(const File& in, const File& out,
const Filter& filter)
{
transform(in, out, filter.getPatterns());
}
void Transformer::copyFile(const File& in, const File& out) {
Pool p;
apr_pool_t* pool = p.getAPRPool();
//
// fairly naive file copy code
//
//
apr_file_t* child_out;
apr_int32_t flags = APR_FOPEN_WRITE | APR_FOPEN_CREATE | APR_FOPEN_TRUNCATE;
apr_status_t stat = out.open(&child_out, flags, APR_OS_DEFAULT, p);
assert(stat == APR_SUCCESS);
apr_file_t* in_file;
stat = in.open(&in_file, APR_FOPEN_READ, APR_OS_DEFAULT, p);
assert(stat == APR_SUCCESS);
apr_size_t bufsize = 32000;
void* buf = apr_palloc(pool, bufsize);
apr_size_t bytesRead = bufsize;
while(stat == 0 && bytesRead == bufsize) {
stat = apr_file_read(in_file, buf, &bytesRead);
if (stat == 0 && bytesRead > 0) {
stat = apr_file_write(child_out, buf, &bytesRead);
assert(stat == APR_SUCCESS);
}
}
stat = apr_file_close(child_out);
assert(stat == APR_SUCCESS);
}
void Transformer::createSedCommandFile(const std::string& regexName,
const log4cxx::Filter::PatternList& patterns,
apr_pool_t* pool) {
apr_file_t* regexFile;
apr_status_t stat = apr_file_open(®exFile,
regexName.c_str(),
APR_FOPEN_WRITE | APR_FOPEN_CREATE | APR_FOPEN_TRUNCATE, APR_OS_DEFAULT,
pool);
assert(stat == APR_SUCCESS);
std::string tmp;
for (log4cxx::Filter::PatternList::const_iterator iter = patterns.begin();
iter != patterns.end();
iter++) {
tmp = "sQ";
tmp.append(iter->first);
tmp.append(1, 'Q');
tmp.append(iter->second);
tmp.append("Qg\n");
apr_file_puts(tmp.c_str(), regexFile);
}
apr_file_close(regexFile);
}
void Transformer::transform(const File& in, const File& out,
const log4cxx::Filter::PatternList& patterns)
{
//
// if no patterns just copy the file
//
if (patterns.size() == 0) {
copyFile(in, out);
} else {
Pool p;
apr_pool_t* pool = p.getAPRPool();
//
// write the regex's to a temporary file since they
// may get mangled if passed as parameters
//
std::string regexName;
Transcoder::encode(in.getPath(), regexName);
regexName.append(".sed");
createSedCommandFile(regexName, patterns, pool);
//
// prepare to launch sed
//
//
apr_procattr_t* attr = NULL;
apr_status_t stat = apr_procattr_create(&attr, pool);
assert(stat == APR_SUCCESS);
stat = apr_procattr_io_set(attr, APR_NO_PIPE, APR_FULL_BLOCK,
APR_FULL_BLOCK);
assert(stat == APR_SUCCESS);
//
// find the program on the path
//
stat = apr_procattr_cmdtype_set(attr, APR_PROGRAM_PATH);
assert(stat == APR_SUCCESS);
//
// build the argument list
// using Q as regex separator on s command
//
const char** args = (const char**)
apr_palloc(pool, 5 * sizeof(*args));
int i = 0;
//
// not well documented
// but the first arg is a duplicate of the executable name
//
args[i++] = "sed";
std::string regexArg("-f");
regexArg.append(regexName);
args[i++] = apr_pstrdup(pool, regexArg.c_str());
//
// specify the input file
args[i++] = Transcoder::encode(in.getPath(), p);
args[i] = NULL;
//
// set the output stream to the filtered file
//
apr_file_t* child_out;
apr_int32_t flags = APR_FOPEN_READ | APR_FOPEN_WRITE |
APR_FOPEN_CREATE | APR_FOPEN_TRUNCATE;
stat = out.open(&child_out, flags, APR_OS_DEFAULT, p);
assert(stat == APR_SUCCESS);
stat = apr_procattr_child_out_set(attr, child_out, NULL);
assert(stat == APR_SUCCESS);
//
// redirect the child's error stream to this processes' error stream
//
apr_file_t* child_err;
stat = apr_file_open_stderr(&child_err, pool);
assert(stat == 0);
stat = apr_procattr_child_err_set(attr, child_err, NULL);
assert(stat == APR_SUCCESS);
apr_proc_t pid;
stat = apr_proc_create(&pid,"sed", args, NULL, attr, pool);
if (stat != APR_SUCCESS) {
puts("Error invoking sed, sed must be on the path in order to run unit tests");
}
assert(stat == APR_SUCCESS);
apr_proc_wait(&pid, NULL, NULL, APR_WAIT);
stat = apr_file_close(child_out);
assert(stat == APR_SUCCESS);
}
}
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