1 files changed, 83 insertions, 0 deletions
diff --git a/blog/sbs_2/cgi-src/get-post-content.cpp b/blog/sbs_2/cgi-src/get-post-content.cpp
new file mode 100644
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+++ b/blog/sbs_2/cgi-src/get-post-content.cpp
@@ -0,0 +1,83 @@
+/*
+ * Copyright 2017 Chris Xiong
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+/*
+ * Get content of a post
+ * query parameters:
+ * p=<string>: post file name
+ * returned object:
+ * HTML fragment of the post
+ */
+#include <dirent.h>
+#include <cstdio>
+#include <cstring>
+#include <algorithm>
+#include <functional>
+#include <vector>
+#include <string>
+#include "cgiutils.hpp"
+#define stripr(s) s[strlen(s)-1]=='\n'?s[strlen(s)-1]=0:0
+std::vector<std::string> fn;
+char buf[262144];
+size_t sz;
+void encrypt()
+{
+	std::string b(buf,sz);
+	for(size_t p=b.find("<encrypted"),i=0;p!=std::string::npos;p=b.find("<encrypted",p),++i)
+	{
+		size_t tag_end=b.find(">",p);
+		std::string attrib=b.substr(p+11,tag_end-p-11);
+		DOMAttrib a(attrib);
+		std::string cont=b.substr(tag_end+1,b.find("</encrypted>",p)-tag_end-1);
+		unsigned hash=5381;
+		std::string key=a.getAttrib("key");
+		a.eraseAttrib("key");
+		for(size_t j=0;j<cont.length();++j)
+		{
+			hash=((hash<<5)+hash)+*reinterpret_cast<unsigned char*>(&cont[j]);
+			cont[j]^=key[j%key.length()];
+		}
+		a.setAttrib("encont",base64_encode(cont));
+		a.setAttrib("hash",std::to_string(hash));
+		a.setAttrib("id","encrypted"+std::to_string(i));
+		cont="Encrypted content here. Click <a href=\"javascript:void(0)\" onclick=\"decryptui("+std::to_string(i)+")\">here</a> to decrypt.";
+		b.replace(p,b.find("</encrypted>",p)-p,"<encrypted "+a.to_string()+">"+cont);
+		p=b.find("</encrypted>",p);
+	}
+	memcpy(buf,b.c_str(),b.length());sz=b.length();
+}
+int main(int argc,char** argv,char** envp)
+{
+	QueryStrParser a;
+	HTTPHeader h;
+	if(!a.exist("p")){h.setStatusCode(400);h.print();return 0;}
+	FILE* f=fopen(("/var/www/html/blog/content/"+a.value("p")+".txt").c_str(),"r");
+	if(!f){h.setStatusCode(400);h.print();return 0;}
+	h.appendHeader("Content-type: text/plain; charset=utf-8");
+	h.print();
+	sz=fread(buf,sizeof(char),262144,f);
+	encrypt();
+	fwrite(buf,sizeof(char),sz,stdout);
+	fclose(f);
+	return 0;
+}