Router: decode uri and args.

4 files changed, 381 insertions, 60 deletions

diff --git a/src/nxt_conf_validation.c b/src/nxt_conf_validation.c
index 0f46560d..a7a8d139 100644
--- a/src/nxt_conf_validation.c
+++ b/src/nxt_conf_validation.c
@@ -85,6 +85,16 @@ static nxt_int_t nxt_conf_vldt_routes_member(nxt_conf_validation_t *vldt,
     nxt_str_t *name, nxt_conf_value_t *value);
 static nxt_int_t nxt_conf_vldt_route(nxt_conf_validation_t *vldt,
     nxt_conf_value_t *value);
+static nxt_int_t nxt_conf_vldt_match_encoded_patterns_sets(
+    nxt_conf_validation_t *vldt, nxt_conf_value_t *value, void *data);
+static nxt_int_t nxt_conf_vldt_match_encoded_patterns_set(
+    nxt_conf_validation_t *vldt, nxt_conf_value_t *value);
+static nxt_int_t nxt_conf_vldt_match_encoded_patterns_set_member(
+    nxt_conf_validation_t *vldt, nxt_str_t *name, nxt_conf_value_t *value);
+static nxt_int_t nxt_conf_vldt_match_encoded_patterns(
+    nxt_conf_validation_t *vldt, nxt_conf_value_t *value, void *data);
+static nxt_int_t nxt_conf_vldt_match_encoded_pattern(
+    nxt_conf_validation_t *vldt, nxt_conf_value_t *value);
 static nxt_int_t nxt_conf_vldt_match_patterns(nxt_conf_validation_t *vldt,
     nxt_conf_value_t *value, void *data);
 static nxt_int_t nxt_conf_vldt_match_pattern(nxt_conf_validation_t *vldt,
@@ -343,12 +353,12 @@ static nxt_conf_vldt_object_t  nxt_conf_vldt_match_members[] = {
 
     { nxt_string("uri"),
       NXT_CONF_VLDT_STRING | NXT_CONF_VLDT_ARRAY,
-      &nxt_conf_vldt_match_patterns,
+      &nxt_conf_vldt_match_encoded_patterns,
       NULL },
 
     { nxt_string("arguments"),
       NXT_CONF_VLDT_OBJECT | NXT_CONF_VLDT_ARRAY,
-      &nxt_conf_vldt_match_patterns_sets,
+      &nxt_conf_vldt_match_encoded_patterns_sets,
       NULL },
 
     { nxt_string("headers"),
@@ -1379,6 +1389,109 @@ nxt_conf_vldt_match_pattern(nxt_conf_validation_t *vldt,
 }
 
 
+static nxt_int_t nxt_conf_vldt_match_encoded_patterns_sets(
+    nxt_conf_validation_t *vldt, nxt_conf_value_t *value, void *data)
+{
+    if (nxt_conf_type(value) == NXT_CONF_ARRAY) {
+        return nxt_conf_vldt_array_iterator(vldt, value,
+                                     &nxt_conf_vldt_match_encoded_patterns_set);
+    }
+
+    /* NXT_CONF_STRING */
+
+    return nxt_conf_vldt_match_encoded_patterns_set(vldt, value);
+}
+
+
+static nxt_int_t nxt_conf_vldt_match_encoded_patterns_set(
+    nxt_conf_validation_t *vldt, nxt_conf_value_t *value)
+{
+    if (nxt_conf_type(value) != NXT_CONF_OBJECT) {
+        return nxt_conf_vldt_error(vldt, "The \"match\" pattern for "
+                                   "\"arguments\" must be an object.");
+    }
+
+    return nxt_conf_vldt_object_iterator(vldt, value,
+                              &nxt_conf_vldt_match_encoded_patterns_set_member);
+}
+
+
+static nxt_int_t
+nxt_conf_vldt_match_encoded_patterns_set_member(nxt_conf_validation_t *vldt,
+    nxt_str_t *name, nxt_conf_value_t *value)
+{
+    u_char  *p, *end;
+
+    if (nxt_slow_path(name->length == 0)) {
+        return nxt_conf_vldt_error(vldt, "The \"match\" pattern objects must "
+                                   "not contain empty member names.");
+    }
+
+    p = nxt_mp_nget(vldt->pool, name->length);
+    if (nxt_slow_path(p == NULL)) {
+        return NXT_ERROR;
+    }
+
+    end = nxt_decode_uri(p, name->start, name->length);
+    if (nxt_slow_path(end == NULL)) {
+        return nxt_conf_vldt_error(vldt, "The \"match\" pattern for "
+                                   "\"arguments\" is encoded but is invalid.");
+    }
+
+    return nxt_conf_vldt_match_encoded_patterns(vldt, value, NULL);
+}
+
+
+static nxt_int_t
+nxt_conf_vldt_match_encoded_patterns(nxt_conf_validation_t *vldt,
+    nxt_conf_value_t *value, void *data)
+{
+    if (nxt_conf_type(value) == NXT_CONF_ARRAY) {
+        return nxt_conf_vldt_array_iterator(vldt, value,
+                                          &nxt_conf_vldt_match_encoded_pattern);
+    }
+
+    /* NXT_CONF_STRING */
+
+    return nxt_conf_vldt_match_encoded_pattern(vldt, value);
+}
+
+
+static nxt_int_t
+nxt_conf_vldt_match_encoded_pattern(nxt_conf_validation_t *vldt,
+    nxt_conf_value_t *value)
+{
+    u_char     *p, *end;
+    nxt_int_t  ret;
+    nxt_str_t  pattern;
+
+    if (nxt_conf_type(value) != NXT_CONF_STRING) {
+        return nxt_conf_vldt_error(vldt, "The \"match\" pattern for \"uri\" "
+                                   "must be a string.");
+    }
+
+    ret = nxt_conf_vldt_match_pattern(vldt, value);
+    if (nxt_slow_path(ret != NXT_OK)) {
+        return ret;
+    }
+
+    nxt_conf_get_string(value, &pattern);
+
+    p = nxt_mp_nget(vldt->pool, pattern.length);
+    if (nxt_slow_path(p == NULL)) {
+        return NXT_ERROR;
+    }
+
+    end = nxt_decode_uri(p, pattern.start, pattern.length);
+    if (nxt_slow_path(end == NULL)) {
+        return nxt_conf_vldt_error(vldt, "The \"match\" pattern for \"uri\" "
+                                   "is encoded but is invalid.");
+    }
+
+    return NXT_OK;
+}
+
+
 static nxt_int_t
 nxt_conf_vldt_match_addrs(nxt_conf_validation_t *vldt,
     nxt_conf_value_t *value, void *data)
diff --git a/src/nxt_http_route.c b/src/nxt_http_route.c
index 06bc91da..5010c561 100644
--- a/src/nxt_http_route.c
+++ b/src/nxt_http_route.c
@@ -39,6 +39,13 @@ typedef enum {
 } nxt_http_route_pattern_case_t;
 
 
+typedef enum {
+    NXT_HTTP_ROUTE_ENCODING_NONE = 0,
+    NXT_HTTP_ROUTE_ENCODING_URI,
+    NXT_HTTP_ROUTE_ENCODING_URI_PLUS
+} nxt_http_route_encoding_t;
+
+
 typedef struct {
     nxt_conf_value_t               *pass;
     nxt_conf_value_t               *ret;
@@ -181,23 +188,27 @@ static nxt_int_t nxt_http_route_action_create(nxt_router_temp_conf_t *tmcf,
     nxt_conf_value_t *cv, nxt_http_action_t *action);
 static nxt_http_route_table_t *nxt_http_route_table_create(nxt_task_t *task,
     nxt_mp_t *mp, nxt_conf_value_t *table_cv, nxt_http_route_object_t object,
-    nxt_bool_t case_sensitive);
+    nxt_bool_t case_sensitive, nxt_http_route_encoding_t encoding);
 static nxt_http_route_ruleset_t *nxt_http_route_ruleset_create(nxt_task_t *task,
     nxt_mp_t *mp, nxt_conf_value_t *ruleset_cv, nxt_http_route_object_t object,
-    nxt_bool_t case_sensitive);
+    nxt_bool_t case_sensitive, nxt_http_route_encoding_t encoding);
 static nxt_http_route_rule_t *nxt_http_route_rule_name_create(nxt_task_t *task,
     nxt_mp_t *mp, nxt_conf_value_t *rule_cv, nxt_str_t *name,
-    nxt_bool_t case_sensitive);
+    nxt_bool_t case_sensitive, nxt_http_route_encoding_t encoding);
 static nxt_http_route_addr_rule_t *nxt_http_route_addr_rule_create(
     nxt_task_t *task, nxt_mp_t *mp, nxt_conf_value_t *cv);
 static nxt_http_route_rule_t *nxt_http_route_rule_create(nxt_task_t *task,
     nxt_mp_t *mp, nxt_conf_value_t *cv, nxt_bool_t case_sensitive,
-    nxt_http_route_pattern_case_t pattern_case);
+    nxt_http_route_pattern_case_t pattern_case,
+    nxt_http_route_encoding_t encoding);
 static int nxt_http_pattern_compare(const void *one, const void *two);
 static int nxt_http_addr_pattern_compare(const void *one, const void *two);
 static nxt_int_t nxt_http_route_pattern_create(nxt_task_t *task, nxt_mp_t *mp,
     nxt_conf_value_t *cv, nxt_http_route_pattern_t *pattern,
-    nxt_http_route_pattern_case_t pattern_case);
+    nxt_http_route_pattern_case_t pattern_case,
+    nxt_http_route_encoding_t encoding);
+static nxt_int_t nxt_http_route_decode_str(nxt_str_t *str,
+    nxt_http_route_encoding_t encoding);
 static u_char *nxt_http_route_pattern_copy(nxt_mp_t *mp, nxt_str_t *test,
     nxt_http_route_pattern_case_t pattern_case);
 
@@ -463,7 +474,8 @@ nxt_http_route_match_create(nxt_task_t *task, nxt_router_temp_conf_t *tmcf,
 
     if (mtcf.scheme != NULL) {
         rule = nxt_http_route_rule_create(task, mp, mtcf.scheme, 1,
-                                          NXT_HTTP_ROUTE_PATTERN_NOCASE);
+                                          NXT_HTTP_ROUTE_PATTERN_NOCASE,
+                                          NXT_HTTP_ROUTE_ENCODING_NONE);
         if (rule == NULL) {
             return NULL;
         }
@@ -475,7 +487,8 @@ nxt_http_route_match_create(nxt_task_t *task, nxt_router_temp_conf_t *tmcf,
 
     if (mtcf.host != NULL) {
         rule = nxt_http_route_rule_create(task, mp, mtcf.host, 1,
-                                          NXT_HTTP_ROUTE_PATTERN_LOWCASE);
+                                          NXT_HTTP_ROUTE_PATTERN_LOWCASE,
+                                          NXT_HTTP_ROUTE_ENCODING_NONE);
         if (rule == NULL) {
             return NULL;
         }
@@ -488,7 +501,8 @@ nxt_http_route_match_create(nxt_task_t *task, nxt_router_temp_conf_t *tmcf,
 
     if (mtcf.uri != NULL) {
         rule = nxt_http_route_rule_create(task, mp, mtcf.uri, 1,
-                                          NXT_HTTP_ROUTE_PATTERN_NOCASE);
+                                          NXT_HTTP_ROUTE_PATTERN_NOCASE,
+                                          NXT_HTTP_ROUTE_ENCODING_URI);
         if (rule == NULL) {
             return NULL;
         }
@@ -501,7 +515,8 @@ nxt_http_route_match_create(nxt_task_t *task, nxt_router_temp_conf_t *tmcf,
 
     if (mtcf.method != NULL) {
         rule = nxt_http_route_rule_create(task, mp, mtcf.method, 1,
-                                          NXT_HTTP_ROUTE_PATTERN_UPCASE);
+                                          NXT_HTTP_ROUTE_PATTERN_UPCASE,
+                                          NXT_HTTP_ROUTE_ENCODING_NONE);
         if (rule == NULL) {
             return NULL;
         }
@@ -514,7 +529,8 @@ nxt_http_route_match_create(nxt_task_t *task, nxt_router_temp_conf_t *tmcf,
 
     if (mtcf.headers != NULL) {
         table = nxt_http_route_table_create(task, mp, mtcf.headers,
-                                            NXT_HTTP_ROUTE_HEADER, 0);
+                                            NXT_HTTP_ROUTE_HEADER, 0,
+                                            NXT_HTTP_ROUTE_ENCODING_NONE);
         if (table == NULL) {
             return NULL;
         }
@@ -525,7 +541,8 @@ nxt_http_route_match_create(nxt_task_t *task, nxt_router_temp_conf_t *tmcf,
 
     if (mtcf.arguments != NULL) {
         table = nxt_http_route_table_create(task, mp, mtcf.arguments,
-                                            NXT_HTTP_ROUTE_ARGUMENT, 1);
+                                            NXT_HTTP_ROUTE_ARGUMENT, 1,
+                                            NXT_HTTP_ROUTE_ENCODING_URI_PLUS);
         if (table == NULL) {
             return NULL;
         }
@@ -536,7 +553,8 @@ nxt_http_route_match_create(nxt_task_t *task, nxt_router_temp_conf_t *tmcf,
 
     if (mtcf.cookies != NULL) {
         table = nxt_http_route_table_create(task, mp, mtcf.cookies,
-                                            NXT_HTTP_ROUTE_COOKIE, 1);
+                                            NXT_HTTP_ROUTE_COOKIE, 1,
+                                            NXT_HTTP_ROUTE_ENCODING_NONE);
         if (table == NULL) {
             return NULL;
         }
@@ -699,7 +717,7 @@ nxt_http_route_action_create(nxt_router_temp_conf_t *tmcf, nxt_conf_value_t *cv,
 static nxt_http_route_table_t *
 nxt_http_route_table_create(nxt_task_t *task, nxt_mp_t *mp,
     nxt_conf_value_t *table_cv, nxt_http_route_object_t object,
-    nxt_bool_t case_sensitive)
+    nxt_bool_t case_sensitive, nxt_http_route_encoding_t encoding)
 {
     size_t                    size;
     uint32_t                  i, n;
@@ -722,8 +740,8 @@ nxt_http_route_table_create(nxt_task_t *task, nxt_mp_t *mp,
     table->object = NXT_HTTP_ROUTE_TABLE;
 
     if (!array) {
-        ruleset = nxt_http_route_ruleset_create(task, mp, table_cv,
-                                                object, case_sensitive);
+        ruleset = nxt_http_route_ruleset_create(task, mp, table_cv, object,
+                                                case_sensitive, encoding);
         if (nxt_slow_path(ruleset == NULL)) {
             return NULL;
         }
@@ -736,8 +754,8 @@ nxt_http_route_table_create(nxt_task_t *task, nxt_mp_t *mp,
     for (i = 0; i < n; i++) {
         ruleset_cv = nxt_conf_get_array_element(table_cv, i);
 
-        ruleset = nxt_http_route_ruleset_create(task, mp, ruleset_cv,
-                                                object, case_sensitive);
+        ruleset = nxt_http_route_ruleset_create(task, mp, ruleset_cv, object,
+                                                case_sensitive, encoding);
         if (nxt_slow_path(ruleset == NULL)) {
             return NULL;
         }
@@ -752,7 +770,7 @@ nxt_http_route_table_create(nxt_task_t *task, nxt_mp_t *mp,
 static nxt_http_route_ruleset_t *
 nxt_http_route_ruleset_create(nxt_task_t *task, nxt_mp_t *mp,
     nxt_conf_value_t *ruleset_cv, nxt_http_route_object_t object,
-    nxt_bool_t case_sensitive)
+    nxt_bool_t case_sensitive, nxt_http_route_encoding_t encoding)
 {
     size_t                    size;
     uint32_t                  i, n, next;
@@ -778,7 +796,7 @@ nxt_http_route_ruleset_create(nxt_task_t *task, nxt_mp_t *mp,
         rule_cv = nxt_conf_next_object_member(ruleset_cv, &name, &next);
 
         rule = nxt_http_route_rule_name_create(task, mp, rule_cv, &name,
-                                               case_sensitive);
+                                               case_sensitive, encoding);
         if (nxt_slow_path(rule == NULL)) {
             return NULL;
         }
@@ -793,15 +811,18 @@ nxt_http_route_ruleset_create(nxt_task_t *task, nxt_mp_t *mp,
 
 static nxt_http_route_rule_t *
 nxt_http_route_rule_name_create(nxt_task_t *task, nxt_mp_t *mp,
-    nxt_conf_value_t *rule_cv, nxt_str_t *name, nxt_bool_t case_sensitive)
+    nxt_conf_value_t *rule_cv, nxt_str_t *name, nxt_bool_t case_sensitive,
+    nxt_http_route_encoding_t encoding)
 {
-    u_char                 c, *p;
+    u_char                 c, *p, *src, *start, *end, plus;
+    uint8_t                d0, d1;
     uint32_t               hash;
     nxt_uint_t             i;
     nxt_http_route_rule_t  *rule;
 
     rule = nxt_http_route_rule_create(task, mp, rule_cv, case_sensitive,
-                                      NXT_HTTP_ROUTE_PATTERN_NOCASE);
+                                      NXT_HTTP_ROUTE_PATTERN_NOCASE,
+                                      encoding);
     if (nxt_slow_path(rule == NULL)) {
         return NULL;
     }
@@ -813,18 +834,65 @@ nxt_http_route_rule_name_create(nxt_task_t *task, nxt_mp_t *mp,
         return NULL;
     }
 
+    hash = NXT_HTTP_FIELD_HASH_INIT;
     rule->u.name.start = p;
 
-    hash = NXT_HTTP_FIELD_HASH_INIT;
+    if (encoding == NXT_HTTP_ROUTE_ENCODING_NONE) {
+        for (i = 0; i < name->length; i++) {
+            c = name->start[i];
+            *p++ = c;
 
-    for (i = 0; i < name->length; i++) {
-        c = name->start[i];
-        *p++ = c;
+            c = case_sensitive ? c : nxt_lowcase(c);
+            hash = nxt_http_field_hash_char(hash, c);
+        }
+
+        goto end;
+    }
+
+    plus = (encoding == NXT_HTTP_ROUTE_ENCODING_URI_PLUS) ? ' ' : '+';
+
+    start = name->start;
+    end = start + name->length;
+
+    for (src = start; src < end; src++) {
+        c = *src;
+
+        switch (c) {
+        case '%':
+            if (nxt_slow_path(end - src <= 2)) {
+                return NULL;
+            }
+
+            d0 = nxt_hex2int[src[1]];
+            d1 = nxt_hex2int[src[2]];
+            src += 2;
+
+            if (nxt_slow_path((d0 | d1) >= 16)) {
+                return NULL;
+            }
+
+            c = (d0 << 4) + d1;
+            *p++ = c;
+            break;
+
+        case '+':
+            c = plus;
+            *p++ = c;
+            break;
+
+        default:
+            *p++ = c;
+            break;
+        }
 
         c = case_sensitive ? c : nxt_lowcase(c);
         hash = nxt_http_field_hash_char(hash, c);
     }
 
+    rule->u.name.length = p - rule->u.name.start;
+
+end:
+
     rule->u.name.hash = nxt_http_field_hash_end(hash) & 0xFFFF;
 
     return rule;
@@ -834,7 +902,8 @@ nxt_http_route_rule_name_create(nxt_task_t *task, nxt_mp_t *mp,
 static nxt_http_route_rule_t *
 nxt_http_route_rule_create(nxt_task_t *task, nxt_mp_t *mp,
     nxt_conf_value_t *cv, nxt_bool_t case_sensitive,
-    nxt_http_route_pattern_case_t pattern_case)
+    nxt_http_route_pattern_case_t pattern_case,
+    nxt_http_route_encoding_t encoding)
 {
     size_t                    size;
     uint32_t                  i, n;
@@ -860,7 +929,7 @@ nxt_http_route_rule_create(nxt_task_t *task, nxt_mp_t *mp,
     if (string) {
         pattern[0].case_sensitive = case_sensitive;
         ret = nxt_http_route_pattern_create(task, mp, cv, &pattern[0],
-                                            pattern_case);
+                                            pattern_case, encoding);
         if (nxt_slow_path(ret != NXT_OK)) {
             return NULL;
         }
@@ -875,7 +944,7 @@ nxt_http_route_rule_create(nxt_task_t *task, nxt_mp_t *mp,
         value = nxt_conf_get_array_element(cv, i);
 
         ret = nxt_http_route_pattern_create(task, mp, value, &pattern[i],
-                                            pattern_case);
+                                            pattern_case, encoding);
         if (nxt_slow_path(ret != NXT_OK)) {
             return NULL;
         }
@@ -972,10 +1041,12 @@ nxt_http_addr_pattern_compare(const void *one, const void *two)
 static nxt_int_t
 nxt_http_route_pattern_create(nxt_task_t *task, nxt_mp_t *mp,
     nxt_conf_value_t *cv, nxt_http_route_pattern_t *pattern,
-    nxt_http_route_pattern_case_t pattern_case)
+    nxt_http_route_pattern_case_t pattern_case,
+    nxt_http_route_encoding_t encoding)
 {
     u_char                         *start;
-    nxt_str_t                      test;
+    nxt_str_t                      test, test2;
+    nxt_int_t                      ret;
     nxt_uint_t                     n, length;
     nxt_http_route_pattern_type_t  type;
 
@@ -988,6 +1059,7 @@ nxt_http_route_pattern_create(nxt_task_t *task, nxt_mp_t *mp,
 
     pattern->negative = 0;
     pattern->any = 1;
+    pattern->min_length = 0;
 
     if (test.length != 0) {
 
@@ -1000,7 +1072,6 @@ nxt_http_route_pattern_create(nxt_task_t *task, nxt_mp_t *mp,
         }
 
         if (test.length != 0) {
-
             if (test.start[0] == '*') {
                 test.start++;
                 test.length--;
@@ -1026,18 +1097,45 @@ nxt_http_route_pattern_create(nxt_task_t *task, nxt_mp_t *mp,
                 length = test.length - 1;
 
                 for (n = 1; n < length; n++) {
-                    if (test.start[n] == '*') {
-                        test.length = n;
-                        type = NXT_HTTP_ROUTE_PATTERN_MIDDLE;
-                        break;
+                    if (test.start[n] != '*') {
+                        continue;
                     }
+
+                    test.length = n;
+
+                    test2.start = &test.start[n + 1];
+                    test2.length = length - n;
+
+                    ret = nxt_http_route_decode_str(&test2, encoding);
+                    if (nxt_slow_path(ret != NXT_OK)) {
+                        return ret;
+                    }
+
+                    type = NXT_HTTP_ROUTE_PATTERN_MIDDLE;
+
+                    pattern->length2 = test2.length;
+                    pattern->min_length += test2.length;
+
+                    start = nxt_http_route_pattern_copy(mp, &test2,
+                                                        pattern_case);
+                    if (nxt_slow_path(start == NULL)) {
+                        return NXT_ERROR;
+                    }
+
+                    pattern->start2 = start;
+                    break;
                 }
             }
+
+            ret = nxt_http_route_decode_str(&test, encoding);
+            if (nxt_slow_path(ret != NXT_OK)) {
+                return ret;
+            }
         }
     }
 
     pattern->type = type;
-    pattern->min_length = test.length;
+    pattern->min_length += test.length;
     pattern->length1 = test.length;
 
     start = nxt_http_route_pattern_copy(mp, &test, pattern_case);
@@ -1047,20 +1145,43 @@ nxt_http_route_pattern_create(nxt_task_t *task, nxt_mp_t *mp,
 
     pattern->start1 = start;
 
-    if (type == NXT_HTTP_ROUTE_PATTERN_MIDDLE) {
-        length -= test.length;
-        pattern->length2 = length;
-        pattern->min_length += length;
+    return NXT_OK;
+}
+
+
+static nxt_int_t
+nxt_http_route_decode_str(nxt_str_t *str, nxt_http_route_encoding_t encoding)
+{
+    u_char  *start, *end;
+
+    switch (encoding) {
+    case NXT_HTTP_ROUTE_ENCODING_NONE:
+        break;
+
+    case NXT_HTTP_ROUTE_ENCODING_URI:
+        start = str->start;
+
+        end = nxt_decode_uri(start, start, str->length);
+        if (nxt_slow_path(end == NULL)) {
+            return NXT_ERROR;
+        }
+
+        str->length = end - start;
+        break;
 
-        test.start = &test.start[test.length + 1];
-        test.length = length;
+    case NXT_HTTP_ROUTE_ENCODING_URI_PLUS:
+        start = str->start;
 
-        start = nxt_http_route_pattern_copy(mp, &test, pattern_case);
-        if (nxt_slow_path(start == NULL)) {
+        end = nxt_decode_uri_plus(start, start, str->length);
+        if (nxt_slow_path(end == NULL)) {
             return NXT_ERROR;
         }
 
-        pattern->start2 = start;
+        str->length = end - start;
+        break;
+
+    default:
+        nxt_unreachable();
     }
 
     return NXT_OK;
@@ -1746,7 +1867,8 @@ static nxt_array_t *
 nxt_http_route_arguments_parse(nxt_http_request_t *r)
 {
     size_t                 name_length;
-    u_char                 c, *p, *start, *end, *name;
+    u_char                 c, *p, *dst, *dst_start, *start, *end, *name;
+    uint8_t                d0, d1;
     uint32_t               hash;
     nxt_bool_t             valid;
     nxt_array_t            *args;
@@ -1766,39 +1888,81 @@ nxt_http_route_arguments_parse(nxt_http_request_t *r)
     name = NULL;
     name_length = 0;
 
+    dst_start = nxt_mp_nget(r->mem_pool, r->args->length);
+    if (nxt_slow_path(dst_start == NULL)) {
+        return NULL;
+    }
+
     start = r->args->start;
     end = start + r->args->length;
 
-    for (p = start; p < end; p++) {
+    for (p = start, dst = dst_start; p < end; p++, dst++) {
         c = *p;
+        *dst = c;
 
-        if (c == '=') {
-            name_length = p - start;
-            name = start;
-            start = p + 1;
+        switch (c) {
+        case '=':
+            if (name != NULL) {
+                break;
+            }
+
+            name_length = dst - dst_start;
             valid = (name_length != 0);
+            name = dst_start;
+            dst_start = dst + 1;
+
+            continue;
 
-        } else if (c == '&') {
+        case '&':
             if (valid) {
                 nv = nxt_http_route_argument(args, name, name_length, hash,
-                                             start, p);
+                                             dst_start, dst);
                 if (nxt_slow_path(nv == NULL)) {
                     return NULL;
                 }
             }
 
             hash = NXT_HTTP_FIELD_HASH_INIT;
+            name_length = 0;
             valid = 1;
             name = NULL;
-            start = p + 1;
+            dst_start = dst + 1;
+
+            continue;
+
+        case '+':
+            c = ' ';
+            *dst = ' ';
+
+            break;
+
+        case '%':
+            if (nxt_slow_path(end - p <= 2)) {
+                break;
+            }
+
+            d0 = nxt_hex2int[p[1]];
+            d1 = nxt_hex2int[p[2]];
+
+            if (nxt_slow_path((d0 | d1) >= 16)) {
+                break;
+            }
+
+            p += 2;
+            c = (d0 << 4) + d1;
+            *dst = c;
+
+            break;
+        }
 
-        } else if (name == NULL) {
+        if (name == NULL) {
             hash = nxt_http_field_hash_char(hash, c);
         }
     }
 
     if (valid) {
-        nv = nxt_http_route_argument(args, name, name_length, hash, start, p);
+        nv = nxt_http_route_argument(args, name, name_length, hash, dst_start,
+                                     dst);
         if (nxt_slow_path(nv == NULL)) {
             return NULL;
         }
diff --git a/src/nxt_string.c b/src/nxt_string.c
index 54f96abc..ab568990 100644
--- a/src/nxt_string.c
+++ b/src/nxt_string.c
@@ -475,7 +475,7 @@ nxt_strvers_match(u_char *version, u_char *prefix, size_t length)
 }
 
 
-static const uint8_t  nxt_hex2int[256]
+const uint8_t  nxt_hex2int[256]
     nxt_aligned(32) =
 {
     16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
@@ -551,6 +551,47 @@ nxt_decode_uri(u_char *dst, u_char *src, size_t length)
 }
 
 
+u_char *
+nxt_decode_uri_plus(u_char *dst, u_char *src, size_t length)
+{
+    u_char   *end, ch;
+    uint8_t  d0, d1;
+
+    nxt_prefetch(&nxt_hex2int['0']);
+
+    end = src + length;
+
+    while (src < end) {
+        ch = *src++;
+
+        switch (ch) {
+        case '%':
+            if (nxt_slow_path(end - src < 2)) {
+                return NULL;
+            }
+
+            d0 = nxt_hex2int[*src++];
+            d1 = nxt_hex2int[*src++];
+
+            if (nxt_slow_path((d0 | d1) >= 16)) {
+                return NULL;
+            }
+
+            ch = (d0 << 4) + d1;
+            break;
+
+        case '+':
+            ch = ' ';
+            break;
+        }
+
+        *dst++ = ch;
+    }
+
+    return dst;
+}
+
+
 uintptr_t
 nxt_encode_uri(u_char *dst, u_char *src, size_t length)
 {
diff --git a/src/nxt_string.h b/src/nxt_string.h
index 7863c60e..7d1e044d 100644
--- a/src/nxt_string.h
+++ b/src/nxt_string.h
@@ -174,10 +174,13 @@ NXT_EXPORT nxt_bool_t nxt_strvers_match(u_char *version, u_char *prefix,
     size_t length);
 
 NXT_EXPORT u_char *nxt_decode_uri(u_char *dst, u_char *src, size_t length);
+NXT_EXPORT u_char *nxt_decode_uri_plus(u_char *dst, u_char *src, size_t length);
 NXT_EXPORT uintptr_t nxt_encode_uri(u_char *dst, u_char *src, size_t length);
 NXT_EXPORT uintptr_t nxt_encode_complex_uri(u_char *dst, u_char *src,
     size_t length);
 NXT_EXPORT nxt_bool_t nxt_is_complex_uri_encoded(u_char *s, size_t length);
 
+NXT_EXPORT const uint8_t  nxt_hex2int[256];
+
 
 #endif /* _NXT_STRING_H_INCLUDED_ */