Biegral Blog

         简单逻辑如下， 欢迎大家挑毛病：

#include <iostream>
using namespace std;

#define TAG_BEGIN  "<p class=\"img-desc\">"
#define TAG_END    "</p>"

void filterHtmlTag(string &strHtml)
{
	unsigned int leftTagLen = string(TAG_BEGIN).size();
	unsigned int rightTagLen = string(TAG_END).size();
	
	while(1)
	{
		unsigned int pos1 = strHtml.find(TAG_BEGIN);
		if(pos1 == string::npos)
		{
			return;
		}

		unsigned int pos2 = strHtml.find(TAG_END, pos1 + leftTagLen);
		if(pos2 == string::npos)
		{
			return;
		}

		strHtml.erase(pos1, pos2 - pos1 + rightTagLen);
	}
}

int main()
{
	{
		string s = "xxx<p class=\"img-desc\">hello world</p>yyyy";
		filterHtmlTag(s);
		cout << s.c_str() << endl;
	}

	{
		string s = "xxx<p class=\"img-desc\"></p>yyyy";
		filterHtmlTag(s);
		cout << s.c_str() << endl;
	}

	{
		string s = "<p class=\"img-desc\"></p>yyyy";
		filterHtmlTag(s);
		cout << s.c_str() << endl;
	}

	{
		string s = "xxx<p class=\"img-desc\"></p>";
		filterHtmlTag(s);
		cout << s.c_str() << endl;
	}

	{
		string s = "<p class=\"img-desc\"></p>";
		filterHtmlTag(s);
		cout << s.c_str() << endl;
	}

	{
		string s = "<p class=\"img-desc\">x</p>";
		filterHtmlTag(s);
		cout << s.c_str() << endl;
	}

	{
		string s = "xxx<p class=\"img-desc\">hello world</p>yyyy,xxx<p class=\"img-desc\">hello world</p>yyyy,xxx<p class=\"img-desc\">hello world</p>yyyy,";
		filterHtmlTag(s);
		cout << s.c_str() << endl;
	}

	{
		string s = "xxx<p class=\"img-desc\"></p>yyyy,xxx<p class=\"img-desc\">hello world</p>yyyy,xxx<p class=\"img-desc\">hello world</p>yyyy,";
		filterHtmlTag(s);
		cout << s.c_str() << endl;
	}

	{
		string s = "xxx<p class=\"img-desc\"></p>yyyy,xxx<p class=\"img-desc\">hello world</p>yyyy,xxx<p class=\"img-desc\">hello world</p>yyyy,";
		filterHtmlTag(s);
		cout << s.c_str() << endl;
	}


	return 0;
}