Skip start anchor for text sections entirely

[metaproxy-moved-to-github.git] / src / filter_http_rewrite.cpp

diff --git a/src/filter_http_rewrite.cpp b/src/filter_http_rewrite.cpp
index d417f46..a918f44 100644 (file)
--- a/src/filter_http_rewrite.cpp
+++ b/src/filter_http_rewrite.cpp
@@ -40,6 +40,7 @@ namespace metaproxy_1 {
     namespace filter {
         class HttpRewrite::Replace {
         public:
+            bool start_anchor;
             boost::regex re;
             boost::smatch what;
             std::string recipe;
@@ -54,7 +55,7 @@ namespace metaproxy_1 {
             std::list<Replace> replace_list;
             const std::string test_patterns(
                 std::map<std::string, std::string> & vars,
-                const std::string & txt);
+                const std::string & txt, bool anchor);
         };
         class HttpRewrite::Within {
         public:
@@ -172,7 +173,7 @@ void yf::HttpRewrite::Phase::rewrite_reqline (mp::odr & o,
         {
             RulePtr rule = it->rule;
             yaz_log(YLOG_LOG, "Proxy request URL is %s", path.c_str());
-            std::string npath = rule->test_patterns(vars, path);
+            std::string npath = rule->test_patterns(vars, path, true);
             if (!npath.empty())
             {
                 yaz_log(YLOG_LOG, "Rewritten request URL is %s", npath.c_str());
@@ -198,7 +199,7 @@ void yf::HttpRewrite::Phase::rewrite_headers(mp::odr & o,
                 sheader += header->value;
 
                 RulePtr rule = it->rule;
-                std::string out = rule->test_patterns(vars, sheader);
+                std::string out = rule->test_patterns(vars, sheader, true);
                 if (!out.empty())
                 {
                     size_t pos = out.find(": ");
@@ -345,7 +346,7 @@ void yf::HttpRewrite::Event::attribute(const char *tag, int tag_len,
         if (subst)
         {
             std::string input(value, val_len);
-            output = it->rule->test_patterns(m_vars, input);
+            output = it->rule->test_patterns(m_vars, input, true);
         }
         if (output.empty())
             wrbuf_write(m_w, value, val_len);
@@ -377,7 +378,7 @@ void yf::HttpRewrite::Event::text(const char *value, int len)
     if (it != m_phase->within_list.end())
     {
         std::string input(value, len);
-        output = it->rule->test_patterns(m_vars, input);
+        output = it->rule->test_patterns(m_vars, input, false);
     }
     if (output.empty())
         wrbuf_write(m_w, value, len);
@@ -387,8 +388,9 @@ void yf::HttpRewrite::Event::text(const char *value, int len)
 
 const std::string yf::HttpRewrite::Rule::test_patterns(
         std::map<std::string, std::string> & vars,
-        const std::string & txt)
+        const std::string & txt, bool anchor)
 {
+    bool first = anchor;
     std::string out;
     std::string::const_iterator start, end;
     start = txt.begin();
@@ -401,6 +403,8 @@ const std::string yf::HttpRewrite::Rule::test_patterns(
             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)
@@ -413,7 +417,7 @@ const std::string yf::HttpRewrite::Rule::test_patterns(
             if (bit == replace_list.end())
                 break;
         }
-
+        first = false;
         size_t i;
         for (i = 1; i < bit->what.size(); ++i)
         {
@@ -445,6 +449,7 @@ void yf::HttpRewrite::Replace::parse_groups(std::string pattern)
     bool esc = false;
     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)
     {