#include <metaproxy/package.hpp>
#include <metaproxy/util.hpp>
#include "filter_http_rewrite.hpp"
+#include "html_parser.hpp"
#include <yaz/zgdu.h>
#include <yaz/log.h>
+#include <stack>
#include <boost/regex.hpp>
#include <boost/lexical_cast.hpp>
+#include <boost/algorithm/string.hpp>
#include <map>
namespace filter {
class HttpRewrite::Replace {
public:
- std::string regex;
+ bool start_anchor;
+ boost::regex re;
+ boost::smatch what;
std::string recipe;
std::map<int, std::string> group_index;
- const std::string search_replace(
- std::map<std::string, std::string> & vars,
- const std::string & txt) const;
- std::string sub_vars (
+ std::string sub_vars(
const std::map<std::string, std::string> & vars) const;
- void parse_groups();
+ void parse_groups(std::string pattern);
};
class HttpRewrite::Rule {
std::list<Replace> replace_list;
const std::string test_patterns(
std::map<std::string, std::string> & vars,
- const std::string & txt) const;
+ const std::string & txt);
};
class HttpRewrite::Within {
public:
std::string header;
std::string attr;
std::string tag;
+ bool reqline;
RulePtr rule;
};
class HttpRewrite::Phase {
public:
+ Phase();
std::list<Within> within_list;
+ int m_verbose;
void rewrite_reqline(mp::odr & o, Z_HTTP_Request *hreq,
std::map<std::string, std::string> & vars) const;
void rewrite_headers(mp::odr & o, Z_HTTP_Header *headers,
char **content_buf, int *content_len,
std::map<std::string, std::string> & vars) const;
};
+ class HttpRewrite::Event : public HTMLParserEvent {
+ void openTagStart(const char *tag, int tag_len);
+ void anyTagEnd(const char *tag, int tag_len, int close_it);
+ void attribute(const char *tag, int tag_len,
+ const char *attr, int attr_len,
+ const char *value, int val_len,
+ const char *sep);
+ void closeTag(const char *tag, int tag_len);
+ void text(const char *value, int len);
+ const Phase *m_phase;
+ WRBUF m_w;
+ std::stack<std::list<Within>::const_iterator> s_within;
+ std::map<std::string, std::string> &m_vars;
+ public:
+ Event(const Phase *p, std::map<std::string, std::string> &vars);
+ ~Event();
+ const char *result();
+ };
}
}
else
{
//TODO what about proto
+ const char *host = z_HTTP_header_lookup(hreq->headers, "Host");
+ if (!host)
+ return;
+
path += "http://";
- path += z_HTTP_header_lookup(hreq->headers, "Host");
+ path += host;
path += hreq->path;
}
- std::list<Within>::const_iterator it = within_list.begin();
- if (it != within_list.end())
- {
- RulePtr rule = it->rule;
- yaz_log(YLOG_LOG, "Proxy request URL is %s", path.c_str());
- std::string npath = rule->test_patterns(vars, path);
- if (!npath.empty())
+ std::list<Within>::const_iterator it = within_list.begin();
+ for (; it != within_list.end(); it++)
+ if (it->reqline)
{
- yaz_log(YLOG_LOG, "Rewritten request URL is %s", npath.c_str());
- hreq->path = odr_strdup(o, npath.c_str());
+ RulePtr rule = it->rule;
+ yaz_log(YLOG_LOG, "Proxy request URL is %s", path.c_str());
+ std::string npath = rule->test_patterns(vars, path);
+ if (!npath.empty())
+ {
+ yaz_log(YLOG_LOG, "Rewritten request URL is %s", npath.c_str());
+ hreq->path = odr_strdup(o, npath.c_str());
+ }
}
- }
}
void yf::HttpRewrite::Phase::rewrite_headers(mp::odr & o,
Z_HTTP_Header *headers,
std::map<std::string, std::string> & vars) const
{
- for (Z_HTTP_Header *header = headers;
- header != 0;
- header = header->next)
+ for (Z_HTTP_Header *header = headers; header; header = header->next)
{
- std::string sheader(header->name);
- sheader += ": ";
- sheader += header->value;
- yaz_log(YLOG_LOG, "%s: %s", header->name, header->value);
-
std::list<Within>::const_iterator it = within_list.begin();
- if (it == within_list.end())
- continue;
- RulePtr rule = it->rule;
-
- std::string out = rule->test_patterns(vars, sheader);
- if (!out.empty())
+ for (; it != within_list.end(); it++)
{
- size_t pos = out.find(": ");
- if (pos == std::string::npos)
+ if (it->header.length() > 0 &&
+ yaz_strcasecmp(it->header.c_str(), header->name) == 0)
{
- yaz_log(YLOG_LOG, "Header malformed during rewrite, ignoring");
- continue;
+ std::string sheader(header->name);
+ sheader += ": ";
+ sheader += header->value;
+
+ RulePtr rule = it->rule;
+ std::string out = rule->test_patterns(vars, sheader);
+ if (!out.empty())
+ {
+ size_t pos = out.find(": ");
+ if (pos == std::string::npos)
+ {
+ yaz_log(YLOG_LOG, "Header malformed during rewrite, ignoring");
+ continue;
+ }
+ header->name = odr_strdup(o, out.substr(0, pos).c_str());
+ header->value = odr_strdup(o,
+ out.substr(pos + 2,
+ std::string::npos).c_str());
+ }
}
- header->name = odr_strdup(o, out.substr(0, pos).c_str());
- header->value = odr_strdup(o, out.substr(pos+2,
- std::string::npos).c_str());
}
}
}
{
if (*content_buf)
{
+ int i;
+ for (i = 0; i < *content_len; i++)
+ if ((*content_buf)[i] == 0)
+ return; // binary content. skip
- std::list<Within>::const_iterator it = within_list.begin();
- if (it != within_list.end())
+ HTMLParser parser;
+ Event ev(this, vars);
+
+ parser.set_verbose(m_verbose);
+
+ std::string buf(*content_buf, *content_len);
+
+ parser.parse(ev, buf.c_str());
+ const char *res = ev.result();
+ *content_buf = odr_strdup(o, res);
+ *content_len = strlen(res);
+ }
+}
+
+yf::HttpRewrite::Event::Event(const Phase *p,
+ std::map<std::string, std::string> & vars
+ ) : m_phase(p), m_vars(vars)
+{
+ m_w = wrbuf_alloc();
+}
+
+yf::HttpRewrite::Event::~Event()
+{
+ wrbuf_destroy(m_w);
+}
+
+const char *yf::HttpRewrite::Event::result()
+{
+ return wrbuf_cstr(m_w);
+}
+
+void yf::HttpRewrite::Event::openTagStart(const char *tag, int tag_len)
+{
+ wrbuf_putc(m_w, '<');
+ wrbuf_write(m_w, tag, tag_len);
+
+ std::string t(tag, tag_len);
+ std::list<Within>::const_iterator it = m_phase->within_list.begin();
+ for (; it != m_phase->within_list.end(); it++)
+ {
+ if (it->tag.length() > 0 && yaz_strcasecmp(it->tag.c_str(),
+ t.c_str()) == 0)
{
- RulePtr rule = it->rule;
+ std::vector<std::string> attr;
+ boost::split(attr, it->attr, boost::is_any_of(","));
+ size_t i;
+ for (i = 0; i < attr.size(); i++)
+ {
+ if (attr[i].compare("#text") == 0)
+ {
+ s_within.push(it);
+ return;
+ }
+ }
+ }
+ }
+}
+
+void yf::HttpRewrite::Event::anyTagEnd(const char *tag, int tag_len,
+ int close_it)
+{
+ if (close_it)
+ {
+ if (!s_within.empty())
+ {
+ std::list<Within>::const_iterator it = s_within.top();
+ std::string t(tag, tag_len);
+ if (yaz_strcasecmp(it->tag.c_str(), t.c_str()) == 0)
+ s_within.pop();
+ }
+ }
+ if (close_it)
+ wrbuf_putc(m_w, '/');
+ wrbuf_putc(m_w, '>');
+}
+
+void yf::HttpRewrite::Event::attribute(const char *tag, int tag_len,
+ const char *attr, int attr_len,
+ const char *value, int val_len,
+ const char *sep)
+{
+ std::list<Within>::const_iterator it = m_phase->within_list.begin();
+ bool subst = false;
- std::string body(*content_buf);
- std::string nbody = rule->test_patterns(vars, body);
- if (!nbody.empty())
+ for (; it != m_phase->within_list.end(); it++)
+ {
+ std::string t(tag, tag_len);
+ if (it->tag.length() == 0 ||
+ yaz_strcasecmp(it->tag.c_str(), t.c_str()) == 0)
+ {
+ std::string a(attr, attr_len);
+ std::vector<std::string> attr;
+ boost::split(attr, it->attr, boost::is_any_of(","));
+ size_t i;
+ for (i = 0; i < attr.size(); i++)
{
- *content_buf = odr_strdup(o, nbody.c_str());
- *content_len = nbody.size();
+ if (attr[i].compare("#text") &&
+ yaz_strcasecmp(attr[i].c_str(), a.c_str()) == 0)
+ subst = true;
}
}
+ if (subst)
+ break;
+ }
+
+ wrbuf_putc(m_w, ' ');
+ wrbuf_write(m_w, attr, attr_len);
+ if (value)
+ {
+ wrbuf_puts(m_w, "=");
+ wrbuf_puts(m_w, sep);
+
+ std::string output;
+ if (subst)
+ {
+ std::string input(value, val_len);
+ output = it->rule->test_patterns(m_vars, input);
+ }
+ if (output.empty())
+ wrbuf_write(m_w, value, val_len);
+ else
+ wrbuf_puts(m_w, output.c_str());
+ wrbuf_puts(m_w, sep);
}
}
-/**
- * Tests pattern from the vector in order and executes recipe on
- the first match.
- */
-const std::string yf::HttpRewrite::Rule::test_patterns(
- std::map<std::string, std::string> & vars,
- const std::string & txt) const
+void yf::HttpRewrite::Event::closeTag(const char *tag, int tag_len)
{
- std::list<Replace>::const_iterator it = replace_list.begin();
+ if (!s_within.empty())
+ {
+ std::list<Within>::const_iterator it = s_within.top();
+ std::string t(tag, tag_len);
+ if (yaz_strcasecmp(it->tag.c_str(), t.c_str()) == 0)
+ s_within.pop();
+ }
+ wrbuf_puts(m_w, "</");
+ wrbuf_write(m_w, tag, tag_len);
+}
- for (; it != replace_list.end(); it++)
+void yf::HttpRewrite::Event::text(const char *value, int len)
+{
+ std::list<Within>::const_iterator it = m_phase->within_list.end();
+ if (!s_within.empty())
+ it = s_within.top();
+ std::string output;
+ if (it != m_phase->within_list.end())
{
- std::string out = it->search_replace(vars, txt);
- if (!out.empty()) return out;
+ std::string input(value, len);
+ output = it->rule->test_patterns(m_vars, input);
}
- return "";
+ if (output.empty())
+ wrbuf_write(m_w, value, len);
+ else
+ wrbuf_puts(m_w, output.c_str());
}
-const std::string yf::HttpRewrite::Replace::search_replace(
+const std::string yf::HttpRewrite::Rule::test_patterns(
std::map<std::string, std::string> & vars,
- const std::string & txt) const
+ const std::string & txt)
{
- //exec regex against value
- boost::regex re(regex);
- boost::smatch what;
+ bool first = true;
+ std::string out;
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
+ while (1)
{
+ std::list<Replace>::iterator bit = replace_list.end();
+ {
+ std::string::const_iterator best_pos = txt.end();
+ std::list<Replace>::iterator it = replace_list.begin();
+ for (; it != replace_list.end(); it++)
+ {
+ if (it->start_anchor && !first)
+ continue;
+ if (regex_search(start, end, it->what, it->re))
+ {
+ if (it->what[0].first < best_pos)
+ {
+ best_pos = it->what[0].first;
+ bit = it;
+ }
+ }
+ }
+ if (bit == replace_list.end())
+ break;
+ }
+ first = false;
size_t i;
- for (i = 1; i < what.size(); ++i)
+ for (i = 1; i < bit->what.size(); ++i)
{
//check if the group is named
- std::map<int, std::string>::const_iterator it
- = group_index.find(i);
- if (it != group_index.end())
+ std::map<int, std::string>::const_iterator git
+ = bit->group_index.find(i);
+ if (git != bit->group_index.end())
{ //it is
- if (!what[i].str().empty())
- vars[it->second] = what[i];
+ vars[git->second] = bit->what[i];
}
}
//prepare replacement string
- std::string rvalue = sub_vars(vars);
+ std::string rvalue = bit->sub_vars(vars);
yaz_log(YLOG_LOG, "! Rewritten '%s' to '%s'",
- what.str(0).c_str(), rvalue.c_str());
- out.append(start, what[0].first);
+ bit->what.str(0).c_str(), rvalue.c_str());
+ out.append(start, bit->what[0].first);
out.append(rvalue);
- start = what[0].second; //move search forward
+ start = bit->what[0].second; //move search forward
}
- //if we had a match cat the last part
if (start != txt.begin())
out.append(start, end);
return out;
}
-void yf::HttpRewrite::Replace::parse_groups()
+void yf::HttpRewrite::Replace::parse_groups(std::string pattern)
{
int gnum = 0;
bool esc = false;
- const std::string & str = regex;
+ const std::string &str = pattern;
std::string res;
+ start_anchor = str[0] == '^';
yaz_log(YLOG_LOG, "Parsing groups from '%s'", str.c_str());
for (size_t i = 0; i < str.size(); ++i)
{
}
esc = false;
}
- regex = res;
+ re = res;
}
-std::string yf::HttpRewrite::Replace::sub_vars (
- const std::map<std::string, std::string> & vars) const
+std::string yf::HttpRewrite::Replace::sub_vars(
+ const std::map<std::string, std::string> & vars) const
{
std::string out;
bool esc = false;
return out;
}
+yf::HttpRewrite::Phase::Phase() : m_verbose(0)
+{
+}
void yf::HttpRewrite::configure_phase(const xmlNode *ptr, Phase &phase)
{
+ static const char *names[2] = { "verbose", 0 };
+ std::string values[1];
+ values[0] = "0";
+ mp::xml::parse_attr(ptr, names, values);
+
+ phase.m_verbose = atoi(values[0].c_str());
+
std::map<std::string, RulePtr > rules;
for (ptr = ptr->children; ptr; ptr = ptr->next)
{
if (!strcmp((const char *) p->name, "rewrite"))
{
Replace replace;
+ std::string from;
const struct _xmlAttr *attr;
for (attr = p->properties; attr; attr = attr->next)
{
if (!strcmp((const char *) attr->name, "from"))
- replace.regex = mp::xml::get_text(attr->children);
+ from = mp::xml::get_text(attr->children);
else if (!strcmp((const char *) attr->name, "to"))
replace.recipe = mp::xml::get_text(attr->children);
else
+ " in rewrite section of http_rewrite");
}
yaz_log(YLOG_LOG, "Found rewrite rule from '%s' to '%s'",
- replace.regex.c_str(), replace.recipe.c_str());
- replace.parse_groups();
- if (!replace.regex.empty())
+ from.c_str(), replace.recipe.c_str());
+ if (!from.empty())
+ {
+ replace.parse_groups(from);
rule->replace_list.push_back(replace);
+ }
}
else
throw mp::filter::FilterException
+ std::string((const char *) p->name)
+ " in http_rewrite filter");
}
- if (!rule->replace_list.empty())
- rules[values[0]] = rule;
+ rules[values[0]] = rule;
}
else if (!strcmp((const char *) ptr->name, "within"))
{
- static const char *names[5] =
- { "header", "attr", "tag", "rule", 0 };
- std::string values[4];
+ static const char *names[6] =
+ { "header", "attr", "tag", "rule", "reqline", 0 };
+ std::string values[5];
mp::xml::parse_attr(ptr, names, values);
Within w;
w.header = values[0];
("Reference to non-existing rule '" + values[3] +
"' in http_rewrite filter");
w.rule = it->second;
+ w.reqline = values[4] == "1";
phase.within_list.push_back(w);
}
else
projects / metaproxy-moved-to-github.git / blobdiff