我有一个C++脚本可以识别人，所以它可以识别人脸，也可以识别属于该人脸的人。我是一个相当C++新手，所以我已经很高兴我能让它工作（原始脚本不是我写的，但需要一些更改才能工作）。
此脚本中有一个函数，当它识别出例如 me，时需要更改 php 文件。
我已经编写了这个函数，但它完全破坏了 php 文件的格式并删除了我不想删除的代码片段。
查找 php 文件并对其进行编辑的C++代码：
if(nWho==P_NICK)
{
fstream calendar("/var/www/html/MagicMirror_Old/calendar.php");
string readout;
string search;
search = "$url = 'some_URL_to_some_site'";
string replace;
replace = "$url = 'some_URL_to_some_other_site'"
while(getline(calendar,readout))
{
if(readout == search)
{
calendar << replace;
}
else
{
calendar << readout;
}
}
}
现在，正在编辑的原始 php 文件在编辑之前具有以下内容：
// Set the url of the calendar feed.
$url = 'some_URL_to_some_site';
/*****************************************/
// Run the helper function with the desired URL and echo the contents.
echo get_url($url);
// Define the helper function that retrieved the data and decodes the content.
function get_url($url)
{
//user agent is very necessary, otherwise some websites like google.com wont give zipped content
$opts = array(
'http'=>array(
'method'=>"GET",
'header'=>"Accept-Language: en-US,en;q=0.8rn" .
"Accept-Encoding: gzip,deflate,sdchrn" .
"Accept-Charset:UTF-8,*;q=0.5rn" .
"User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:19.0) Gecko/20100101 Firefox/19.0 FirePHP/0.4rn",
"ignore_errors" => true //Fix problems getting data
),
//Fixes problems in ssl
"ssl" => array(
"verify_peer"=>false,
"verify_peer_name"=>false
)
);
$context = stream_context_create($opts);
$content = file_get_contents($url ,false,$context);
//If http response header mentions that content is gzipped, then uncompress it
foreach($http_response_header as $c => $h)
{
if(stristr($h, 'content-encoding') and stristr($h, 'gzip'))
{
//Now lets uncompress the compressed data
$content = gzinflate( substr($content,10,-8) );
}
}
return $content;
}
C++编辑文件后，将变为以下内容：
<?php
<?php Set the url of the calendar feed.
Set the url of the calendar feed.= 'https://p01-calendarws.icloud.com/ca/subscribe/1/n6x7Farxpt7m9S8bHg1TGArSj7J6kanm_2KEoJPL5YIAk3y70FpRo4GyWwO-6QfHSY5mXtHcRGVxYZUf7U3HPDOTG5x0qYnno1Zr_VuKH2M';
= 'https://p01-calendarws.icloud.com/ca/subscribe/1/n6x7Farxpt7m9S8bHg1TGArSj7J6kanm_2KEoJPL5YIAk3y70FpRo4GyWwO-6QfHSY5mXtHcRGVxYZUf7U3HPDOTG5x0qYnno1Zr_VuKH2M';***********/
***********/ helper function with the desired URL and echo the contents.
helper function with the desired URL and echo the contents.trieved the data and decodes the content.
trieved the data and decodes the content.ent is very necessary, otherwise some websites like google.com wont give zipped content
ent is very necessary, otherwise some websites like google.com wont give zipped content'header'=>"Accept-Language: en-US,en;q=0.8rn" .
'header'=>"Accept-Language: en-US,en;q=0.8rn" .,deflate,sdchrn" .
,deflate,sdchrn" . "Accept-Charset:UTF-8,*;q=0.5rn" .
"Accept-Charset:UTF-8,*;q=0.5rn" .illa/5.0 (X11; Linux x86_64; rv:19.0) Gecko/20100101 Firefox/19.0 FirePHP/0.4rn",
illa/5.0 (X11; Linux x86_64; rv:19.0) Gecko/20100101 Firefox/19.0 FirePHP/0.4rn",ixes problems in ssl
ixes problems in ssl "verify_peer"=>false,
"verify_peer"=>false,=>false
=>false );
); $context = stream_context_create($opts);
$context = stream_context_create($opts);e,$context);
e,$context); /If http response header mentions that content is gzipped, then uncompress it
/If http response header mentions that content is gzipped, then uncompress it, 'content-encoding') and stristr($h, 'gzip'))
, 'content-encoding') and stristr($h, 'gzip'))the compressed data
the compressed datant = gzinflate( substr($content,10,-8) );
nt = gzinflate( substr($content,10,-8) );tent;
tent;
正如您可能注意到的那样，考虑到文件的原始状态，这不是文件的外观。
基本上只有第二行的$url需要用不同的 url 替换，php 文件的其余格式应该保持不变。有没有办法在C++做到这一点？
在此 SO 答案中获取 replace（） 和 replaceAll（） 函数的代码来替换字符串中的一些文本：
#include <iostream>
#include <fstream>
#include <sstream>
using namespace std;
bool replace(std::string& str, const std::string& from, const std::string& to) {
size_t start_pos = str.find(from);
if(start_pos == std::string::npos)
return false;
str.replace(start_pos, from.length(), to);
return true;
}
void replaceAll(std::string& str, const std::string& from, const std::string& to) {
if(from.empty())
return;
size_t start_pos = 0;
while((start_pos = str.find(from, start_pos)) != std::string::npos) {
str.replace(start_pos, from.length(), to);
start_pos += to.length(); // In case 'to' contains 'from', like replacing 'x' with 'yx'
}
}
int main()
{
ifstream calendar("calendar.php");
std::stringstream buffer;
// read whole file in a buffer
buffer << calendar.rdbuf();
// use a new file for output
ofstream newcalendar;
newcalendar.open("newcalendar.php");
string search = "$url = 'some_URL_to_some_site'";
string to = "$url = 'some_URL_to_some_other_site'";
string content = buffer.str();
replaceAll(content, search, to);
newcalendar << content;
newcalendar.close();
calendar.close();
remove("calendar.php");
rename("newcalendar.php", "calendar.php");
return 0;
}
小心，搜索文本的拼写必须准确！
编辑：添加了两行用于重命名文件