#include "router_chain.hpp"
#include <metaproxy/package.hpp>
-#define BOOST_REGEX_MATCH_EXTRA
-
#include <boost/regex.hpp>
+#include <boost/lexical_cast.hpp>
#define BOOST_AUTO_TEST_MAIN
#define BOOST_TEST_DYN_LINK
using namespace boost::unit_test;
namespace mp = metaproxy_1;
+typedef std::pair<std::string, std::string> string_pair;
+typedef std::vector<string_pair> spair_vec;
+typedef spair_vec::iterator spv_iter;
+
class FilterHeaderRewrite: public mp::filter::Base {
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
+ {
+ //TODO what about proto
+ path += z_HTTP_header_lookup(hreq->headers, "Host");
+ path += hreq->path;
+ }
+ std::cout << "Proxy request URL is " << path << std::endl;
+ std::string npath =
+ test_patterns(vars, path, req_uri_pats, req_groups_bynum);
+ 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 = test_patterns(vars,
+ std::string(header->value),
+ req_uri_pats, req_groups_bynum);
+ 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 = test_patterns(vars,
+ std::string(header->value),
+ res_uri_pats, res_groups_bynum);
+ 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
+ /**
+ * Tests pattern from the vector in order and executes recipe on
+ the first match.
+ */
+ const std::string test_patterns(
+ std::map<std::string, std::string> & vars,
+ const std::string & txt,
+ const spair_vec & uri_pats,
+ const std::vector<std::map<int, std::string> > & groups_bynum_vec)
+ const
+ {
+ for (int i = 0; i < uri_pats.size(); i++)
+ {
+ std::string out = search_replace(vars, txt,
+ uri_pats[i].first, uri_pats[i].second,
+ groups_bynum_vec[i]);
+ if (!out.empty()) return out;
+ }
+ return "";
+ }
+
+
+ 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 std::map<int, std::string> & groups_bynum) const
{
//exec regex against value
- boost::regex e(req_uri_pat, boost::regex::perl);
+ boost::regex re(uri_re);
boost::smatch what;
- std::string hvalue(header->value);
- if(boost::regex_match(hvalue, what, e, boost::match_extra))
+ 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)
+ {
+ //check if the group is named
+ std::map<int, std::string>::const_iterator it
+ = groups_bynum.find(i);
+ if (it != groups_bynum.end())
+ { //it is
+ std::string name = it->second;
+ if (!what[i].str().empty())
+ vars[name] = what[i];
+ }
+
+ }
+ //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 spair_vec & uri_pats,
+ std::vector<std::map<int, std::string> > & groups_bynum_vec)
+ {
+ for (int h = 0; h < uri_pats.size(); h++)
{
- unsigned i, j;
- std::cout << "** Match found **\n Sub-Expressions:\n";
- for(i = 0; i < what.size(); ++i)
- std::cout << " $" << i << " = \"" << what[i] << "\"\n";
- std::cout << " Captures:\n";
- for(i = 0; i < what.size(); ++i)
+ int gnum = 0;
+ bool esc = false;
+ //regex is first, subpat is second
+ std::string str = uri_pats[h].first;
+ //for each pair we have an indexing map
+ std::map<int, std::string> groups_bynum;
+ for (int i = 0; i < str.size(); ++i)
{
- std::cout << " $" << i << " = {";
- for(j = 0; j < what.captures(i).size(); ++j)
+ if (!esc && str[i] == '\\')
{
- if(j)
- std::cout << ", ";
- else
- std::cout << " ";
- std::cout << "\"" << what.captures(i)[j] << "\"";
+ esc = true;
+ continue;
}
- std::cout << " }\n";
+ if (!esc && str[i] == '(') //group starts
+ {
+ gnum++;
+ 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
+ {
+ i++;
+ std::string gname;
+ bool term = false;
+ while (++i < str.size())
+ {
+ if (str[i] == '>') { term = true; break; }
+ if (!isalnum(str[i]))
+ throw mp::filter::FilterException
+ ("Only alphanumeric chars allowed, found "
+ " in '"
+ + str
+ + "' at "
+ + boost::lexical_cast<std::string>(i));
+ gname += str[i];
+ }
+ if (!term)
+ throw mp::filter::FilterException
+ ("Unterminated group name '" + gname
+ + " in '" + str +"'");
+ groups_bynum[gnum] = gname;
+ std::cout << "Found named group '" << gname
+ << "' at $" << gnum << std::endl;
+ }
+ }
+ }
+ esc = false;
}
+ groups_bynum_vec.push_back(groups_bynum);
}
- else
+ }
+
+ static std::string sub_vars (const std::string & in,
+ const std::map<std::string, std::string> & vars)
+ {
+ std::string out;
+ bool esc = false;
+ for (int i = 0; i < in.size(); ++i)
{
- std::cout << "** No Match found **\n";
+ if (!esc && in[i] == '\\')
+ {
+ esc = true;
+ continue;
+ }
+ if (!esc && in[i] == '$') //var
+ {
+ if (i+1 < in.size() && in[i+1] == '{') //ref prefix
+ {
+ ++i;
+ std::string name;
+ bool term = false;
+ while (++i < in.size())
+ {
+ if (in[i] == '}') { term = true; break; }
+ name += in[i];
+ }
+ if (!term) throw mp::filter::FilterException
+ ("Unterminated var ref in '"+in+"' at "
+ + boost::lexical_cast<std::string>(i));
+ std::map<std::string, std::string>::const_iterator it
+ = vars.find(name);
+ if (it != vars.end())
+ {
+ out += it->second;
+ }
+ }
+ else
+ {
+ throw mp::filter::FilterException
+ ("Malformed or trimmed var ref in '"
+ +in+"' at "+boost::lexical_cast<std::string>(i));
+ }
+ continue;
+ }
+ //passthru
+ out += in[i];
+ esc = false;
}
- //iteratate over named groups
- //set the captured values in the map
- //rewrite the header according to the hardcoded recipe
- };
+ return out;
+ }
- void configure(const std::string & req_uri_pat,
- const std::string & resp_uri_pat)
+ void configure(
+ const spair_vec req_uri_pats,
+ const spair_vec res_uri_pats)
{
- this->req_uri_pat = req_uri_pat;
- this->resp_uri_pat = resp_uri_pat;
+ //TODO should we really copy them out?
+ this->req_uri_pats = req_uri_pats;
+ this->res_uri_pats = res_uri_pats;
+ //pick up names
+ parse_groups(req_uri_pats, req_groups_bynum);
+ parse_groups(res_uri_pats, res_groups_bynum);
};
private:
std::map<std::string, std::string> vars;
- std::string req_uri_pat;
- std::string resp_uri_pat;
+ spair_vec req_uri_pats;
+ spair_vec res_uri_pats;
+ std::vector<std::map<int, std::string> > req_groups_bynum;
+ std::vector<std::map<int, std::string> > res_groups_bynum;
+
};
mp::RouterChain router;
FilterHeaderRewrite fhr;
- fhr.configure(".*(localhost).*", ".*(localhost).*");
+
+ spair_vec vec_req;
+ vec_req.push_back(std::make_pair(
+ "(?<proto>http\\:\\/\\/s?)(?<pxhost>[^\\/?#]+)\\/(?<pxpath>[^\\/]+)"
+ "\\/(?<target>.+)",
+ "${proto}${target}"
+ ));
+ vec_req.push_back(std::make_pair(
+ "proxyhost",
+ "localhost"
+ ));
+
+ spair_vec vec_res;
+
+ fhr.configure(vec_req, vec_res);
+
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;
BOOST_CHECK(hres);
}
- catch ( ... ) {
+ catch (std::exception & e) {
+ std::cout << e.what();
BOOST_CHECK (false);
}
}
projects / metaproxy-moved-to-github.git / blobdiff