public:
void process(mp::Package & package) const {
Z_GDU *gdu = package.request().get();
+ //map of request/response vars
+ std::map<std::string, std::string> vars;
//we have an http req
if (gdu && gdu->which == Z_GDU_HTTP_Request)
{
- std::cout << "Request headers" << std::endl;
- Z_HTTP_Request *hreq = gdu->u.HTTP_Request;
- //dump req headers
- for (Z_HTTP_Header *header = hreq->headers;
- header != 0;
- header = header->next)
- {
- std::cout << header->name << ": " << header->value << std::endl;
- rewrite_req_header(header);
- }
+ Z_HTTP_Request *hreq = gdu->u.HTTP_Request;
+ mp::odr o;
+ //rewrite the request line
+ std::string path;
+ if (strstr(hreq->path, "http://") == hreq->path)
+ {
+ std::cout << "Path in the method line is absolute, "
+ "possibly a proxy request\n";
+ path += hreq->path;
+ }
+ else
+ {
+ path += z_HTTP_header_lookup(hreq->headers, "Host");
+ path += hreq->path;
+ }
+ std::cout << "Proxy request URL is " << path << std::endl;
+ std::string npath =
+ search_replace(vars, path, req_uri_rx, req_uri_pat);
+ std::cout << "Resp request URL is " << npath << std::endl;
+ if (!npath.empty())
+ hreq->path = odr_strdup(o, npath.c_str());
+ std::cout << ">> Request headers" << std::endl;
+ //iterate headers
+ for (Z_HTTP_Header *header = hreq->headers;
+ header != 0;
+ header = header->next)
+ {
+ std::cout << header->name << ": " << header->value << std::endl;
+ std::string out = search_replace(vars,
+ std::string(header->value),
+ req_uri_rx, req_uri_pat);
+ if (!out.empty())
+ header->value = odr_strdup(o, out.c_str());
+ }
+ package.request() = gdu;
}
package.move();
gdu = package.response().get();
if (gdu && gdu->which == Z_GDU_HTTP_Response)
{
- std::cout << "Respose headers" << std::endl;
- Z_HTTP_Response *hr = gdu->u.HTTP_Response;
- //dump resp headers
- for (Z_HTTP_Header *header = hr->headers;
- header != 0;
- header = header->next)
- {
- std::cout << header->name << ": " << header->value << std::endl;
- }
+ Z_HTTP_Response *hr = gdu->u.HTTP_Response;
+ std::cout << "Response " << hr->code;
+ std::cout << "<< Respose headers" << std::endl;
+ mp::odr o;
+ //iterate headers
+ for (Z_HTTP_Header *header = hr->headers;
+ header != 0;
+ header = header->next)
+ {
+ std::cout << header->name << ": " << header->value << std::endl;
+ std::string out = search_replace(vars,
+ std::string(header->value),
+ resp_uri_rx, resp_uri_pat);
+ if (!out.empty())
+ header->value = odr_strdup(o, out.c_str());
+ }
+ package.response() = gdu;
}
-
};
+
void configure(const xmlNode* ptr, bool test_only, const char *path) {};
- void rewrite_req_header(Z_HTTP_Header *header) const
+ const std::string search_replace(
+ std::map<std::string, std::string> & vars,
+ const std::string txt,
+ const std::string & uri_re,
+ const std::string & uri_pat) const
{
//exec regex against value
- boost::regex re(req_uri_rx);
+ boost::regex re(uri_re);
boost::smatch what;
- std::string hvalue(header->value);
- std::map<std::string, std::string> vars;
- if (regex_match(hvalue, what, re))
+ std::string::const_iterator start, end;
+ start = txt.begin();
+ end = txt.end();
+ std::string out;
+ while (regex_search(start, end, what, re)) //find next full match
{
unsigned i;
for (i = 1; i < what.size(); ++i)
if (it != groups_by_num.end())
{ //it is
std::string name = it->second;
- vars[name] = what[i];
+ if (!what[i].str().empty())
+ vars[name] = what[i];
}
+
}
- //rewrite the header according to the recipe
- std::string rvalue = sub_vars(req_uri_pat, vars);
- std::cout << "Rewritten '"+hvalue+"' to '"+rvalue+"'\n";
- }
- else
- {
- std::cout << "No match found in '" + hvalue + "'\n";
+ //prepare replacement string
+ std::string rvalue = sub_vars(uri_pat, vars);
+ //rewrite value
+ std::string rhvalue = what.prefix().str()
+ + rvalue + what.suffix().str();
+ std::cout << "! Rewritten '"+what.str(0)+"' to '"+rvalue+"'\n";
+ out += rhvalue;
+ start = what[0].second; //move search forward
}
+ return out;
};
static void parse_groups(const std::string & str,
if (i+1 < str.size() && str[i+1] == '?') //group with attrs
{
i++;
+ if (i+1 < str.size() && str[i+1] == ':') //non-capturing
+ {
+ if (gnum > 0) gnum--;
+ i++;
+ continue;
+ }
if (i+1 < str.size() && str[i+1] == 'P') //optional, python
i++;
if (i+1 < str.size() && str[i+1] == '<') //named
std::map<std::string, std::string>::const_iterator it
= vars.find(name);
if (it != vars.end())
+ {
out += it->second;
+ }
}
else
{
FilterHeaderRewrite fhr;
fhr.configure(
- ".*?(?<host>[^:]+):(?<port>\\d+).*",
- "http://${host}:${port}/somepath",
- ".*(localhost).*",
- "http:://g");
+ "((?<proto>http\\:\\/\\/s?)(?<pxhost>[^\\/?#]+)\\/(?<pxpath>[^\\/]+)"
+ "(?<target>.+))|(proxyhost)",
+ "${proto}${target}${whatever}",
+ //rewrite connection close
+ "close",
+ "open for ${host}");
+
mp::filter::HTTPClient hc;
router.append(fhr);
mp::odr odr;
Z_GDU *gdu_req = z_get_HTTP_Request_uri(odr,
- "http://localhost:80/~jakub/targetsite.php", 0, 1);
+ "http://proxyhost/proxypath/localhost:80/~jakub/targetsite.php", 0, 1);
pack.request() = gdu_req;