1 files changed, 200 insertions, 0 deletions
diff --git a/blog/sbs_2/cgi-src/get-archive-list.cpp b/blog/sbs_2/cgi-src/get-archive-list.cpp
new file mode 100644
index 0000000..28f316d
--- /dev/null
+++ b/blog/sbs_2/cgi-src/get-archive-list.cpp
@@ -0,0 +1,200 @@
+/*
+ * 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 list of archives
+ * query parameters:
+ * pn=<int>: page number, defaults to 0
+ * pp=<int>: number of posts per page, defaults to 20
+ * pc: if exists, gets how many pages are there from the current pp value
+ * f: tag filter.
+ * gt: get a list of tags used by posts instead.
+ * qn=<filename>: query the neibouring posts of the given post.
+ * returned object:
+ * A number if pc exists denoting number of pages.
+ * Or the following JSON object if gf exists.
+ * ["tag1","tag2",...]
+ * Or the following JSON object if qn exists.
+ * {
+ * 	"prev": <last post>
+ * 	"succ": <next post>
+ * }
+ * Otherwise returns archive list in JSON:
+ * {
+ * 	"postsPerPage": <requested pp>
+ * 	"postsOnPage": <number of posts on this page>
+ * 	"page": <requested pn>
+ * 	"posts": [
+ * 		{
+ * 			"filename": ...
+ * 			"title": ...
+ * 			"date": ...
+ * 			"tags": ...
+ * 		},
+ * 		...
+ * 	]
+ * }
+ */
+#include <dirent.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <cstdio>
+#include <cstring>
+#include <algorithm>
+#include <functional>
+#include <vector>
+#include <map>
+#include <set>
+#include <string>
+#include "cgiutils.hpp"
+#define stripr(s) s[strlen(s)-1]=='\n'?s[strlen(s)-1]=0:0
+struct post
+{
+	std::string t,d,tg;
+};
+std::map<std::string,post,std::greater<std::string>> f;
+char buf[65536];
+int main(int argc,char** argv,char** envp)
+{
+	struct stat idxs,cdirs;
+	stat("/var/www/html/blog/content/pindex",&idxs);
+	stat("/var/www/html/blog/content",&cdirs);
+	if(cdirs.st_mtim.tv_sec>idxs.st_mtim.tv_sec)
+	system("/var/www/html/blog/content/util/indexer > /dev/null 2> /dev/null");
+	QueryStrParser a;
+	FILE *fidx=fopen("/var/www/html/blog/content/pindex","r");
+	while(fgets(buf,65536,fidx))
+	{
+		stripr(buf);std::vector<std::string> v;
+		split(std::string(buf),'\t',v);
+		if(v.size()==4)
+		f[v[0]]=post{v[1],v[2],v[3]};
+	}
+	fclose(fidx);
+	HTTPHeader h;
+	if(a.exist("gt"))
+	{
+		std::set<std::string> s;
+		std::vector<std::string> v;
+		for(auto i=f.begin();i!=f.end();++i)
+		{
+			split(i->second.tg,',',v);
+			for(size_t j=0;j<v.size();++j)
+			s.insert("\"#"+v[j]+"\"");
+		}
+		h.appendHeader("Content-type: text/plain; charset=utf-8");
+		h.print();
+		printf("[");
+		auto it=s.begin();
+		printf("%s",it->c_str());
+		while(++it!=s.end())printf(",%s",it->c_str());
+		printf("]");
+	}
+	else
+	{
+		if(a.exist("f"))
+		for(auto i=f.begin();i!=f.end();)
+		{
+			std::vector<std::string> v;
+			split(i->second.tg,',',v);
+			std::set<std::string> sv=std::set<std::string>(v.begin(),v.end());
+			if(sv.find(a.value("f"))==sv.end()){auto t=i++;f.erase(t);}
+			else i++;
+		}
+		if(a.exist("pc"))
+		{
+			int pp=0;
+			if(!a.exist("pp"))pp=20;
+			else{
+				try{
+					pp=std::stoi(a.value("pp"));
+				}catch(std::exception e){h.setStatusCode(400);}
+			}
+			if(!pp)h.setStatusCode(400);
+			h.appendHeader("Content-type: text/plain; charset=utf-8");
+			h.print();
+			printf("%lu\n",f.size()/pp+((f.size()%pp)?1:0));
+			return 0;
+		}
+		else if(a.exist("qn"))
+		{
+			if(f.find(a.value("qn"))==f.end())
+			h.setStatusCode(400);
+			h.print();if(h.statusCode()>=400)return 0;
+			auto i=f.find(a.value("qn"));
+			std::string pr="",sc="";
+			auto t=i;if(t!=f.begin())pr=(--t)->first;
+			t=i;if(!(++t==f.end()))sc=t->first;
+			printf("{\"prev\":\"%s\",\"succ\":\"%s\"}",sc.c_str(),pr.c_str());
+			return 0;
+		}
+		else
+		{
+			unsigned pp=20,pn=0;
+			if(!a.exist("pp"))pp=20;
+			else{
+				try{
+					pp=std::stoi(a.value("pp"));
+				}catch(std::exception e){h.setStatusCode(400);}
+			}
+			if(!a.exist("pn"))pn=0;
+			else{
+				try{
+					pn=std::stoi(a.value("pn"));
+				}catch(std::exception e){h.setStatusCode(400);}
+			}
+			if(!pp)h.setStatusCode(400);
+			if(pn>=f.size()/pp+((f.size()%pp)?1:0))h.setStatusCode(400);
+			int rpp=(pn!=f.size()/pp+((f.size()%pp)?1:0)-1)?pp:
+			f.size()-pp*(f.size()/pp+((f.size()%pp)?1:0)-1);
+			h.appendHeader("Content-type: text/plain; charset=utf-8");
+			h.print();
+			if(h.statusCode()>=400)return 0;
+			puts("{");
+			printf("\t\"postsPerPage\":%d,\n",pp);
+			printf("\t\"postsOnPage\":%d,\n",rpp);
+			printf("\t\"page\":%d,\n",pn);
+			puts("\t\"posts\": [");
+			auto it=f.begin();std::advance(it,pn*pp);
+			for(int i=0;i<rpp-1;++i)
+			{
+				puts("\t\t{");
+				printf("\t\t\t\"filename\":\"%s\",\n",it->first.c_str());
+				printf("\t\t\t\"title\":\"%s\",\n",it->second.t.c_str());
+				printf("\t\t\t\"date\":\"%s\",\n",it->second.d.c_str());
+				printf("\t\t\t\"tags\":\"%s\"\n",it->second.tg.c_str());
+				puts("\t\t},");++it;
+			}
+			puts("\t\t{");
+			printf("\t\t\t\"filename\":\"%s\",\n",it->first.c_str());
+			printf("\t\t\t\"title\":\"%s\",\n",it->second.t.c_str());
+			printf("\t\t\t\"date\":\"%s\",\n",it->second.d.c_str());
+			printf("\t\t\t\"tags\":\"%s\"\n",it->second.tg.c_str());
+			puts("\t\t}");
+			puts("\t]");
+			puts("}");
+		}
+	}
+	return 0;
+}