TSG-8550 Proxy Policy支持对网页中的元素进行编辑 Element Editing

plugin/business/pangu-http/CMakeLists.txt

@@ -1,7 +1,8 @@
-add_library(pangu-http src/pangu_logger.cpp src/pangu_http.cpp src/pattern_replace.cpp src/pangu_web_cache.cpp)
+add_library(pangu-http src/pangu_logger.cpp src/pangu_http.cpp src/pattern_replace.cpp src/pangu_web_cache.cpp src/pangu_element_edit.cpp)
 target_link_libraries(pangu-http PUBLIC common http tango-cache-client)
 target_link_libraries(pangu-http PUBLIC rdkafka ctemplate-static cjson pcre2-static ratelimiter-static libdablooms pthread)
 target_link_libraries(pangu-http PUBLIC maatframe)
+target_link_libraries(pangu-http PUBLIC libxml2-static z)
 
 add_executable(test_pattern_replace src/test_pattern_replace.cpp src/pattern_replace.cpp)
 target_link_libraries(test_pattern_replace common gtest pcre2-static)

plugin/business/pangu-http/src/pangu_element_edit.cpp

@@ -0,0 +1,667 @@
+#include <tfe_utils.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <stdlib.h>
+#include <assert.h>
+
+#include <libxml/tree.h>
+#include <libxml/xmlsave.h>
+#include <libxml/HTMLparser.h>
+#include <cjson/cJSON.h>
+
+#include "pangu_element_edit.h"
+
+int cjson_element_foreach(cJSON *a, int *depth, int *step, char **node, const struct element_rule * rules, int *match_num);
+static void html_node_list(const struct element_rule * rules, xmlNodePtr node, xmlNodePtr *parent_array, size_t *n_parent, int *match);
+
+enum search_scope scope_name_to_id(const char * name)
+{
+	const char * std_name[] = {"inside_element","whole_file"};
+	size_t i = 0;
+	for (i = 0; i < sizeof(std_name) / sizeof(const char *); i++)
+	{
+		if (0 == strcasecmp(name, std_name[i]))
+		{
+			break;
+		}
+	}
+	return (enum search_scope) i;
+}
+
+int match_start_indicator(xmlNodePtr parent, char * start_indicator)
+{
+	if(parent->properties == NULL)
+	{
+		return 0;
+	}
+
+	struct _xmlAttr *properties = parent->properties;
+	if(properties->children == NULL || properties->children->content == NULL)
+	{
+		return 0;
+	}
+
+	xmlNodePtr children = properties->children;
+	if(!strcasecmp((char *)children->content, start_indicator))
+	{
+		return 1;
+	}
+
+	return 0;
+}
+
+int construct_cjson_by_treatment(cJSON *a_element, char **node, int *step, const struct element_rule * rules)
+{
+	const char *element_treatment=rules->element_treatment;
+
+	if(element_treatment != NULL &&  !strcasecmp(element_treatment, "mark"))
+	{
+		cJSON_AddBoolToObject(a_element, "need_filter", true);
+	}
+
+	char * start_indicator = rules->start_indicator;
+	if(element_treatment != NULL &&  !strcasecmp(element_treatment, "remove"))
+	{
+		if (rules->scope == kScopeInside)
+		{
+			if(a_element->string != NULL && strcasecmp(a_element->string, start_indicator))
+			{
+				return 0;
+			}
+		}
+
+		if(a_element->type == cJSON_Object && *node != NULL)
+		{
+			cJSON_DeleteItemFromObject(a_element, *node);
+		}
+		if(a_element->type == cJSON_Array)
+		{
+			cJSON_DeleteItemFromArray(a_element, *step);
+		}
+	}
+
+	return 0;
+}
+
+int construct_html_by_treatment(const struct element_rule * rules, xmlNodePtr node, xmlNodePtr *parent_array, size_t *n_parent, int *match)
+{
+	int k=0;
+
+	if(strcasestr((char *)node->content, rules->contained_keyword) == NULL)
+	{
+		return 0;
+	}
+
+	const char *element_treatment=rules->element_treatment;
+	int distane_from_matching = rules->distane_from_matching;
+
+	if(element_treatment != NULL &&  !strcasecmp(element_treatment, "mark"))
+	{
+		xmlNodePtr parent = node->parent;
+		k++;
+		while (parent != NULL)
+	    {
+			if(k == distane_from_matching)
+			{
+				xmlNewProp(parent, (const xmlChar *)"need_filter", (const xmlChar *)"true");
+				*match =1;
+				break;
+			}
+			k++;
+			parent = parent->parent;
+		}
+	}
+
+	char * start_indicator = rules->start_indicator;
+	if(element_treatment != NULL &&  !strcasecmp(element_treatment, "remove"))
+	{
+		xmlNodePtr parent = node->parent;
+		k++;
+		while (parent != NULL)
+	    {
+			if(k == distane_from_matching)
+			{
+				if (rules->scope == kScopeInside && match_start_indicator(parent, start_indicator) == 0)
+				{
+					break;
+				}
+
+				/*This is the top floor, Don't deal with**/
+				if(parent->parent == NULL)
+				{
+					break;
+				}
+
+				if(*n_parent < 16)
+				{
+					parent_array[*n_parent] = parent;
+					*n_parent = *n_parent+1;
+				}
+
+				*match =1;
+				break;
+			}
+
+			k++;
+			parent = parent->parent;
+		}
+	}
+
+	return 0;
+}
+
+int cjson_dump_array(cJSON *a, int *depth, int *step, char **node, const struct element_rule * rules, int *match_num)
+{
+	int xret=0;
+
+	cJSON *a_element = a->child;
+    for (; (a_element != NULL);)
+    {
+		xret = cjson_element_foreach(a_element, depth, step, node, rules, match_num);
+		if(xret == -1)
+		{
+			return -1;
+		}
+		if(*depth == 0)
+		{
+			construct_cjson_by_treatment(a_element, node, step, rules);
+		}
+		if(xret == 1)
+		{
+			*node = a_element->string;
+			*depth = *depth -1;
+			return 1;
+		}
+		*step= *step + 1;
+        a_element = a_element->next;
+    }
+
+	return xret;
+}
+
+int cjson_dump_object(cJSON *a, int *depth, int *step, char **node, const struct element_rule * rules, int *match_num)
+{
+	int xret=0;
+	cJSON *a_element=NULL;
+
+    cJSON_ArrayForEach(a_element, a)
+    {
+		xret = cjson_element_foreach(a_element, depth, step, node, rules, match_num);
+		if(xret == -1)
+		{
+			return -1;
+		}
+		if(*depth == 0)
+		{
+			construct_cjson_by_treatment(a_element, node, step, rules);
+		}
+		if(xret == 1)
+		{
+			*node = a_element->string;
+			*depth = *depth -1;
+			return 1;
+		}
+    }
+	return xret;
+}
+
+int cjson_dump_string(cJSON *a, int *depth, const struct element_rule * rules, int *match_num)
+{
+	int xret=0;
+
+	if((a->valuestring != NULL) && strcasestr(a->valuestring, rules->contained_keyword))
+	{
+		if(*depth != -1)
+		{
+			xret = 1;
+			goto finish;
+		}
+		*match_num = *match_num + 1;
+	}
+finish:
+	return xret;
+}
+
+int cjson_element_foreach(cJSON *a, int *depth, int *step, char **node, const struct element_rule * rules, int *match_num)
+{
+    if ((a == NULL) || cJSON_IsInvalid(a))
+    {
+        return -1;
+    }
+
+    switch (a->type & 0xFF)
+    {
+        case cJSON_String:
+        case cJSON_Raw:
+			return cjson_dump_string(a, depth, rules, match_num);
+
+        case cJSON_Array:
+          	return cjson_dump_array(a, depth, step, node, rules, match_num);
+
+        case cJSON_Object:
+    		return cjson_dump_object(a, depth, step, node, rules, match_num);
+
+	 	case cJSON_Number:
+		case cJSON_False:
+        case cJSON_True:
+        case cJSON_NULL:
+            return 0;
+        default:
+            return -1;
+    }
+
+	return 0;
+}
+
+static void html_namespace_list(xmlNsPtr ns)
+{
+    while (ns != NULL)
+	{
+        ns = ns->next;
+    }
+}
+
+static void html_attr_list(const struct element_rule * rules, xmlAttrPtr attr, xmlNodePtr *parent_array, size_t *n_parent, int *match)
+{
+    while (attr != NULL)
+	{
+		if (attr->children != NULL)
+		{
+			html_node_list(rules, attr->children, parent_array, n_parent, match);
+		}
+
+        attr = attr->next;
+    }
+}
+
+static void html_dump_one_node(const struct element_rule * rules, xmlNodePtr node, xmlNodePtr *parent_array, size_t *n_parent, int *match)
+{
+	switch (node->type)
+	{
+        case XML_ELEMENT_NODE:
+		case XML_ELEMENT_DECL:
+		case XML_CDATA_SECTION_NODE:
+        case XML_ENTITY_REF_NODE:
+        case XML_ENTITY_NODE:
+        case XML_PI_NODE:
+        case XML_COMMENT_NODE:
+        case XML_DOCUMENT_TYPE_NODE:
+        case XML_DOCUMENT_FRAG_NODE:
+        case XML_NOTATION_NODE:
+		case XML_TEXT_NODE:
+            break;
+
+        default:
+            return;
+	}
+    if ((node->type == XML_ELEMENT_NODE) && (node->nsDef != NULL))
+    {
+        html_namespace_list(node->nsDef);
+    }
+
+    if ((node->type == XML_ELEMENT_NODE) && (node->properties != NULL))
+    {
+        html_attr_list(rules, node->properties, parent_array, n_parent, match);
+   	}
+
+    if (node->type != XML_ENTITY_REF_NODE)
+	{
+        if ((node->type != XML_ELEMENT_NODE) && (node->content != NULL))
+		{
+            construct_html_by_treatment(rules, node, parent_array, n_parent, match);
+        }
+    }
+}
+
+static void html_dump_node(const struct element_rule * rules, xmlNodePtr node, xmlNodePtr *parent_array, size_t *n_parent, int *match)
+{
+    html_dump_one_node(rules, node, parent_array, n_parent, match);
+    if ((node->type != XML_NAMESPACE_DECL) && (node->children != NULL) && (node->type != XML_ENTITY_REF_NODE))
+	{
+        html_node_list(rules, node->children, parent_array, n_parent, match);
+    }
+}
+
+static void html_node_list(const struct element_rule * rules, xmlNodePtr node, xmlNodePtr *parent_array, size_t *n_parent, int *match)
+{
+    while (node != NULL)
+	{
+        html_dump_node(rules, node, parent_array, n_parent, match);
+        node = node->next;
+    }
+}
+
+static void html_element_foreach(const struct element_rule * rules, xmlDocPtr doc, xmlNodePtr *parent_array, size_t *n_parent, int *match)
+{
+    if (((doc->type == XML_DOCUMENT_NODE) || (doc->type == XML_HTML_DOCUMENT_NODE)) && (doc->children != NULL))
+	{
+        html_node_list(rules, doc->children, parent_array, n_parent, match);
+    }
+}
+
+size_t parse_json_output_unformatted(const char * in, size_t in_sz, const struct element_rule * rules, char** out)
+{
+	int step=0, depth=0, match_num=0,i=0, match=0;
+	cJSON* interator=NULL;
+	char* new_out = NULL, *node=NULL;
+	size_t outlen=0;
+	char *element_treatment=NULL;
+
+	interator = cJSON_Parse(in);
+	if(interator==NULL)
+	{
+		goto finish;
+	}
+
+	depth = -1;
+	element_treatment=rules->element_treatment;
+
+	cjson_element_foreach(interator, &depth, &step, &node, rules, &match_num);
+	for(i=0; i< match_num; i++)
+	{
+		depth = rules->distane_from_matching;
+		step=0; node=NULL;
+		match |= cjson_element_foreach(interator, &depth, &step, &node, rules, &match_num);
+
+		if(!strcasecmp(element_treatment, "remove") && match == 1 && node != NULL && depth == 0)
+		{
+			cJSON_DeleteItemFromObject(interator, node);
+		}
+	}
+
+	if(match==1 && element_treatment != NULL &&  !strcasecmp(element_treatment, "mark"))
+	{
+		cJSON_AddBoolToObject(interator, "need_check", true);
+	}
+
+	new_out = cJSON_PrintUnformatted(interator);
+	if(new_out!=NULL)
+	{
+		*out = new_out;
+		outlen = strlen(new_out);
+	}
+
+finish:
+	if(interator != NULL)
+		cJSON_Delete(interator);
+	return outlen;
+}
+
+size_t format_json_file_type(const char * in, size_t in_sz, const struct element_rule * rules, char** out)
+{
+	int step=0, depth=0, match=0, i=0;
+	cJSON* interator=NULL;
+	char* new_out = NULL, *node=NULL;
+	size_t outlen=0; int match_num=0;
+	char *element_treatment=NULL;
+
+	char*new_in = ALLOC(char, in_sz+1);
+	memcpy(new_in, in, in_sz);
+
+	interator = cJSON_Parse(new_in);
+	if(interator==NULL)
+	{
+		goto finish;
+	}
+
+	depth = -1;
+	element_treatment=rules->element_treatment;
+
+	cjson_element_foreach(interator, &depth, &step, &node, rules, &match_num);
+	for(i=0; i< match_num; i++)
+	{
+		depth = rules->distane_from_matching;
+		step=0; node=NULL;
+		match |= cjson_element_foreach(interator, &depth, &step, &node, rules, &match_num);
+
+		if(!strcasecmp(element_treatment, "remove") && match == 1 && node != NULL && depth == 0)
+		{
+			cJSON_DeleteItemFromObject(interator, node);
+		}
+	}
+
+	if(match == 0)
+	{
+		goto finish;
+	}
+
+	if(element_treatment != NULL &&  !strcasecmp(element_treatment, "mark"))
+	{
+		cJSON_AddBoolToObject(interator, "need_check", true);
+	}
+
+	new_out = cJSON_Print(interator);
+	if(new_out!=NULL)
+	{
+		*out = new_out;
+		outlen = strlen(*out);
+	}
+
+finish:
+	if(interator != NULL)
+		cJSON_Delete(interator);
+	FREE(&new_in);
+	return outlen;
+}
+
+size_t format_multidelete_json_type(const char * in, size_t in_sz, const struct element_rule * rules, char** out)
+{
+	char *new_out=NULL, *pre_out=NULL;
+	char * tmp = ALLOC(char, in_sz+1);
+	char * token = NULL, * sub_token = NULL, * saveptr = NULL;
+	size_t output_size = 0;
+
+	size_t new_out_len=0;
+	/**Follow-up optimization */
+	new_out = ALLOC(char, in_sz+in_sz/3);
+
+	memcpy(tmp, in, in_sz);
+
+	for (token = tmp;; token = NULL)
+	{
+		sub_token = strtok_r(token, "\n", &saveptr);
+		if (sub_token == NULL)
+		{
+			new_out[new_out_len-2]='\0';
+			break;
+		}
+		output_size = parse_json_output_unformatted(sub_token, strlen(sub_token), rules, &pre_out);
+		if(output_size>0 && pre_out!=NULL)
+		{
+			memcpy(new_out+new_out_len, pre_out, strlen(pre_out));
+			new_out_len += strlen(pre_out);
+			memcpy(new_out+new_out_len, "\r\n", 2);
+			new_out_len +=2;
+			FREE(&pre_out);
+		}
+	}
+
+	if(new_out)
+	{
+		*out = new_out;
+		output_size = strlen(new_out);
+	}
+
+	free(tmp);
+	tmp = NULL;
+	return output_size;
+}
+
+size_t construct_format_html(htmlDocPtr doc, char**out)
+{
+	size_t outlen=0;
+	xmlBufferPtr out_buffer;
+	const xmlChar *xmlCharBuffer;
+	xmlSaveCtxtPtr saveCtxtPtr;
+
+	out_buffer = xmlBufferCreate();
+    if (out_buffer ==  NULL)
+    {
+		goto finish;
+    }
+
+    saveCtxtPtr = xmlSaveToBuffer(out_buffer, "UTF-8", XML_SAVE_NO_DECL);
+    if (xmlSaveDoc(saveCtxtPtr, doc) < 0)
+    {
+		goto finish;
+	}
+    xmlSaveClose(saveCtxtPtr);
+
+	xmlCharBuffer = xmlBufferContent(out_buffer);
+	if(xmlCharBuffer != NULL)
+	{
+		char*new_out = ALLOC(char, strlen((char *)xmlCharBuffer)+1);
+		memcpy(new_out, (char *)xmlCharBuffer, strlen((char *)xmlCharBuffer));
+
+		*out = new_out;
+		outlen = strlen((char *)xmlCharBuffer);
+	}
+
+finish:
+	if(out_buffer != NULL)
+	{
+		xmlBufferFree(out_buffer);
+	}
+
+	return outlen;
+}
+
+size_t format_input_html(const char * in, size_t in_sz, const struct element_rule * rules, char** out)
+{
+	size_t outlen=0, n_parent=0, n_parent_peer=0;
+	int match=0, i=0;
+	htmlDocPtr doc = NULL;
+	const char *element_treatment=NULL;
+	xmlNodePtr parent_array[16];
+
+	int options = XML_PARSE_NOERROR;
+
+	doc = htmlReadMemory(in, in_sz, NULL, NULL, options);
+	if (doc == NULL)
+	{
+		goto finish;
+	}
+
+    html_element_foreach(rules, doc, parent_array, &n_parent, &match);
+	if(match != 1)
+	{
+		goto finish;
+	}
+
+	n_parent_peer = n_parent;
+	element_treatment=rules->element_treatment;
+
+	if(element_treatment != NULL &&  !strcasecmp(element_treatment, "remove"))
+	{
+		for(i=0; i < (int)n_parent_peer; i++)
+		{
+			match =0; n_parent = 0;
+			html_element_foreach(rules, doc, parent_array, &n_parent, &match);
+			if(match == 1)
+			{
+				xmlUnlinkNode(parent_array[0]);
+				xmlFreeNode(parent_array[0]);
+			}
+		}
+	}
+
+	if(element_treatment != NULL &&  !strcasecmp(element_treatment, "mark"))
+	{
+		if(doc->children != NULL && doc->children->next != NULL)
+		{
+			xmlNewProp(doc->children->next, (const xmlChar *)"need_check", (const xmlChar *)"true");
+		}
+	}
+
+	outlen = construct_format_html(doc, out);
+	if(outlen<=0)
+	{
+		outlen=0;
+	}
+
+finish:
+	if(doc!=NULL)
+	{
+		xmlFreeDoc(doc);
+	}
+	return outlen;
+}
+
+size_t format_html_file_type(const char * interator, size_t interator_sz, const struct element_rule *rule, char **new_out)
+{
+	size_t output_size=0;
+
+	if(interator[0] == '{')
+	{
+		output_size = format_multidelete_json_type(interator, interator_sz, rule, new_out);
+	}
+	else
+	{
+		output_size = format_input_html(interator, interator_sz, rule, new_out);
+	}
+
+	return output_size;
+}
+
+size_t parse_string(const char * interator, size_t interator_sz, const struct element_rule *rule, char **new_out, int options)
+{
+	size_t output_size=0;
+
+	if(options)
+	{
+		output_size = format_json_file_type(interator, interator_sz, rule, new_out);
+	}
+	else
+	{
+		output_size = format_html_file_type(interator, interator_sz, rule, new_out);
+	}
+
+	return output_size;
+}
+
+size_t execute_edit_element_rule(const char * in, size_t in_sz, const struct element_rule *rules, size_t n_rule, char** out, int options)
+{
+	const struct element_rule * todo = rules;
+	size_t i = 0, interator_sz=0, pre_out_sz=0;
+	const char * interator = NULL;
+	char* new_out = NULL, * pre_out = NULL;
+	size_t output_size=0;
+	if (in_sz == 0 || in==NULL)
+	{
+		return 0;
+	}
+	interator = in;
+	interator_sz = in_sz;
+	for (i = 0; i < n_rule; i++)
+	{
+		output_size = parse_string(interator, interator_sz, &(todo[i]), &new_out, options);
+		if (output_size == 0)
+		{
+			continue;
+		}
+		if (pre_out != NULL)
+		{
+			free(pre_out);
+			pre_out = NULL;
+		}
+		pre_out = new_out;
+		pre_out_sz = output_size;
+
+		interator = new_out;
+		interator_sz = output_size;
+
+		new_out=NULL;
+		output_size=0;
+	}
+	if(pre_out_sz>0)
+	{
+		*out=pre_out;
+		return pre_out_sz;
+	}
+	else
+	{
+		return 0;
+	}
+}
+

plugin/business/pangu-http/src/pangu_element_edit.h

@@ -0,0 +1,22 @@
+#pragma once
+#include <stddef.h>
+
+enum search_scope
+{
+    kScopeInside = 0,
+    kScopeWhole,
+    KScopeMax
+};
+
+struct element_rule
+{
+    enum search_scope scope;
+    int distane_from_matching;
+    char * start_indicator;
+    char *element_treatment;
+    char * contained_keyword;
+};
+
+size_t execute_edit_element_rule(const char * in, size_t in_sz, const struct element_rule *rules, size_t n_rule, char** out, int options);
+enum search_scope scope_name_to_id(const char * name);
+

plugin/business/pangu-http/src/pangu_http.cpp

@@ -1,4 +1,5 @@
 #include "pangu_logger.h"
+#include "pangu_element_edit.h"
 #include "pattern_replace.h"
 #include "pangu_web_cache.h"
 
@@ -53,6 +54,7 @@ enum manipulate_action
 	MA_ACTION_REPLACE,
 	MA_ACTION_HIJACK,
 	MA_ACTION_INSERT,
+	MA_ACTION_ELEMENT,
 	__MA_ACTION_MAX
 };
 
@@ -120,7 +122,11 @@ struct policy_action_param
 	int status_code;
 
 	size_t n_rule;
-	struct replace_rule *rule;
+	struct replace_rule *repl_rule;
+
+	size_t e_rule;
+	struct element_rule *elem_rule;
+
 	pthread_mutex_t lock;
 };
 
@@ -308,6 +314,7 @@ static enum manipulate_action manipulate_action_str2idx(const char *action_str)
 	clue_action_map[MA_ACTION_REPLACE]= "replace";
 	clue_action_map[MA_ACTION_HIJACK]= "hijack";
 	clue_action_map[MA_ACTION_INSERT]= "insert";
+	clue_action_map[MA_ACTION_ELEMENT] = "edit_element";
 
 	size_t i = 0;
 
@@ -334,7 +341,7 @@ void policy_action_param_new(int idx, const struct Maat_rule_t* rule, const char
 		return;
 	}
 	int rule_id;
-	cJSON *json=NULL, *rules=NULL, *item=NULL;
+	cJSON *json=NULL, *rules=NULL, *item=NULL, *sub_item=NULL;
 	json=cJSON_Parse(srv_def_large);
 	if(json==NULL)
 	{
@@ -419,19 +426,19 @@ void policy_action_param_new(int idx, const struct Maat_rule_t* rule, const char
 				break;
 			}
 			rule_id = 0;
-			param->rule = ALLOC(struct replace_rule, MAX_EDIT_ZONE_NUM);
+			param->repl_rule = ALLOC(struct replace_rule, MAX_EDIT_ZONE_NUM);
 			for (item = rules->child; item != NULL; item = item->next)
 			{
 				char * search  = cJSON_GetObjectItem(item , "search_in")->valuestring;
 				if (search == NULL) break;
 
-				param->rule[rule_id].zone = zone_name_to_id(search);
-				if (param->rule[rule_id].zone == kZoneMax)
+				param->repl_rule[rule_id].zone = zone_name_to_id(search);
+				if (param->repl_rule[rule_id].zone == kZoneMax)
 				{
 					break;
 				}
-				param->rule[rule_id].find = tfe_strdup(cJSON_GetObjectItem(item , "find")->valuestring);
-				param->rule[rule_id].replace_with = tfe_strdup(cJSON_GetObjectItem(item , "replace_with")->valuestring);
+				param->repl_rule[rule_id].find = tfe_strdup(cJSON_GetObjectItem(item , "find")->valuestring);
+				param->repl_rule[rule_id].replace_with = tfe_strdup(cJSON_GetObjectItem(item , "replace_with")->valuestring);
 				rule_id++;
 			}
 			param->n_rule = rule_id;
@@ -470,6 +477,44 @@ void policy_action_param_new(int idx, const struct Maat_rule_t* rule, const char
 				param->enforcement_ratio = 1;
 			}
 			break;
+		case MA_ACTION_ELEMENT:
+			rules = cJSON_GetObjectItem(json, "rules");
+			if(rules == NULL)
+			{
+				break;
+			}
+			rule_id = 0;
+			param->elem_rule = ALLOC(struct element_rule, MAX_EDIT_ZONE_NUM);
+			for (item = rules->child; item != NULL; item = item->next)
+			{
+				sub_item=cJSON_GetObjectItem(item,"anchor_element");
+				if(sub_item != NULL && sub_item->type ==cJSON_Object)
+				{
+					char * search_scope  = cJSON_GetObjectItem(sub_item , "search_scope")->valuestring;
+					if (search_scope == NULL) break;
+
+					param->elem_rule[rule_id].scope = scope_name_to_id(search_scope);
+					if (param->elem_rule[rule_id].scope == KScopeMax)
+					{
+						break;
+					}
+					if(param->elem_rule[rule_id].scope == kScopeInside)
+					{
+						param->elem_rule[rule_id].start_indicator = tfe_strdup(cJSON_GetObjectItem(sub_item , "start_indicator")->valuestring);
+					}
+					param->elem_rule[rule_id].contained_keyword = tfe_strdup(cJSON_GetObjectItem(sub_item,"contained_keyword")->valuestring);
+				}
+
+				sub_item=cJSON_GetObjectItem(item,"target_element");
+				if(sub_item != NULL && sub_item->type ==cJSON_Object)
+				{
+					param->elem_rule[rule_id].distane_from_matching = cJSON_GetObjectItem(sub_item , "target_distance_from_matching")->valueint;
+					param->elem_rule[rule_id].element_treatment = tfe_strdup(cJSON_GetObjectItem(sub_item,"element_treatment")->valuestring);
+				}
+				rule_id++;
+			}
+			param->e_rule = rule_id;
+			break;
 		default: assert(0);
 			break;
 	}
@@ -497,10 +542,19 @@ void policy_action_param_free_cb(int table_id, const struct Maat_rule_t* rule, c
 	}
 	pthread_mutex_unlock(&(param->lock));
 	pthread_mutex_destroy(&(param->lock));
+	for(i=0; i<param->e_rule; i++)
+	{
+		if(param->elem_rule[i].start_indicator!=NULL)
+		{
+			FREE(&(param->elem_rule[i].start_indicator));
+		}
+		FREE(&(param->elem_rule[i].element_treatment));
+		FREE(&(param->elem_rule[i].contained_keyword));
+	}
 	for(i=0; i<param->n_rule; i++)
 	{
-		FREE(&(param->rule[i].find));
-		FREE(&(param->rule[i].replace_with));
+		FREE(&(param->repl_rule[i].find));
+		FREE(&(param->repl_rule[i].replace_with));
 	}
 
 	if (param->message)
@@ -933,6 +987,15 @@ struct insert_ctx
 	int actually_inserted;
 };
 
+struct edit_element_ctx
+{
+	struct element_rule *item;
+	size_t n_item;
+	struct tfe_http_half * editing;
+	struct evbuffer *http_body;
+	int actually_edited;
+};
+
 struct ip_data_ctx
 {
 	char *asn_client;
@@ -960,6 +1023,7 @@ struct pangu_http_ctx
 	int manipulate_replaced;
 	struct replace_ctx * rep_ctx;
 	struct insert_ctx * ins_ctx;
+	struct edit_element_ctx * edit_ctx;
 	struct ip_data_ctx ip_ctx;
 
 	int (* resumed_cb)(const struct tfe_stream * stream,
@@ -1007,6 +1071,17 @@ void http_ins_ctx_free(struct insert_ctx* ins_ctx)
 	return;
 }
 
+void http_element_ctx_free(struct edit_element_ctx *edit_ctx)
+{
+	if (edit_ctx->http_body)
+	{
+		evbuffer_free(edit_ctx->http_body);
+		edit_ctx->http_body = NULL;
+	}
+	FREE(&edit_ctx);
+	return;
+}
+
 void http_ip_ctx_free(struct ip_data_ctx *ip_ctx)
 {
 	if(ip_ctx->asn_client)
@@ -1042,6 +1117,11 @@ static void pangu_http_ctx_free(struct pangu_http_ctx * ctx)
 		http_ins_ctx_free(ctx->ins_ctx);
 		ctx->ins_ctx = NULL;
 	}
+	if(ctx->edit_ctx)
+	{
+		http_element_ctx_free(ctx->edit_ctx);
+		ctx->edit_ctx = NULL;
+	}
 
 	http_ip_ctx_free(&ctx->ip_ctx);
 	ctx->manipulate_replaced=0;
@@ -1351,7 +1431,7 @@ void http_replace(const struct tfe_stream * stream, const struct tfe_http_sessio
 		{
 			struct policy_action_param *param = ctx->param;
 			ctx->rep_ctx = rep_ctx = ALLOC(struct replace_ctx, 1);
-			rep_ctx->rule = param->rule;
+			rep_ctx->rule = param->repl_rule;
 			rep_ctx->n_rule = param->n_rule;
 		}
 		else
@@ -1447,8 +1527,7 @@ void http_replace(const struct tfe_stream * stream, const struct tfe_http_sessio
 		{
 			options = 1;
 		}
-		rewrite_sz = execute_replace_rule(__http_body, __http_body_len, r_zone,
-									rep_ctx->rule, rep_ctx->n_rule, &rewrite_buff, options);
+		rewrite_sz = execute_replace_rule(__http_body, __http_body_len, r_zone, rep_ctx->rule, rep_ctx->n_rule, &rewrite_buff, options);
 
 		if (rewrite_sz >0 )
 		{
@@ -1878,7 +1957,7 @@ static void http_insert(const struct tfe_stream * stream, const struct tfe_http_
 		}
 		else
 		{
-			TFE_STREAM_LOG_INFO(stream, "Can only setup replace on REQ/RESP headers, detached.");
+			TFE_STREAM_LOG_INFO(stream, "Can only setup insert on REQ/RESP headers, detached.");
 			ctx->action = PG_ACTION_NONE;
 			tfe_http_session_detach(session); return;
 		}
@@ -1974,6 +2053,124 @@ static void http_insert(const struct tfe_stream * stream, const struct tfe_http_
 	return;
 }
 
+void http_element(const struct tfe_stream * stream, const struct tfe_http_session * session, enum tfe_http_event events,
+	const unsigned char * body_frag, size_t frag_size, struct pangu_http_ctx * ctx)
+{
+	struct tfe_http_session * to_write_sess = NULL;
+	char * rewrite_buff = NULL;
+	size_t rewrite_sz = 0;
+
+	if (tfe_http_in_request(events))
+	{
+		return;
+	}
+
+	to_write_sess = tfe_http_session_allow_write(session);
+	if (to_write_sess == NULL)
+	{
+		TFE_STREAM_LOG_INFO(stream, "tfe_http_session_allow_write() %s failed.", session->req->req_spec.uri);
+		ctx->action = PG_ACTION_NONE;
+		tfe_http_session_detach(session); return;
+	}
+
+	struct edit_element_ctx * edit_ctx = ctx->edit_ctx;
+	if (ctx->edit_ctx == NULL)
+	{
+		if (events & EV_HTTP_RESP_HDR)
+		{
+			struct policy_action_param *param = ctx->param;
+			ctx->edit_ctx = edit_ctx = ALLOC(struct edit_element_ctx, 1);
+			edit_ctx->item = param->elem_rule;
+			edit_ctx->n_item = param->e_rule;
+		}
+		else
+		{
+			TFE_STREAM_LOG_INFO(stream, "Can only setup editing on RESP headers, detached.");
+			ctx->action = PG_ACTION_NONE;
+			tfe_http_session_detach(session); return;
+		}
+	}
+
+	struct tfe_http_half * in_resp_half = session->resp;
+	struct tfe_http_resp_spec * in_resp_spec = &in_resp_half->resp_spec;
+
+	if (events & EV_HTTP_RESP_HDR)
+	{
+		edit_ctx->editing= tfe_http_session_response_create(to_write_sess, in_resp_spec->resp_code);
+		tfe_http_session_response_set(to_write_sess, edit_ctx->editing);
+		struct tfe_http_half * in_half = in_resp_half;
+
+		struct http_field_name in_header_field{};
+		const char * in_header_value = NULL;
+		void * iterator = NULL;
+
+		while (true)
+		{
+			if ((in_header_value = tfe_http_field_iterate(in_half, &iterator, &in_header_field)) == NULL)
+			{
+				break;
+			}
+			tfe_http_field_write(edit_ctx->editing, &in_header_field, in_header_value);
+		}
+	}
+
+	if (events & EV_HTTP_RESP_BODY_BEGIN)
+	{
+		assert(edit_ctx->http_body == NULL);
+		edit_ctx->http_body = evbuffer_new();
+	}
+
+	if (events & EV_HTTP_RESP_BODY_CONT)
+	{
+		evbuffer_add(edit_ctx->http_body, body_frag, frag_size);
+	}
+
+	if (events & EV_HTTP_RESP_BODY_END)
+	{
+		char * __http_body = (char *) evbuffer_pullup(edit_ctx->http_body, -1);
+		size_t __http_body_len = evbuffer_get_length(edit_ctx->http_body);
+
+		rewrite_buff = NULL;
+		rewrite_sz = 0;
+
+		if(in_resp_spec->content_type != NULL && strcasestr(in_resp_spec->content_type, "text/html"))
+		{
+			rewrite_sz = execute_edit_element_rule(__http_body, __http_body_len, edit_ctx->item, edit_ctx->n_item, &rewrite_buff, 0);
+		}
+		if(in_resp_spec->content_type != NULL && strcasestr(in_resp_spec->content_type, "json"))
+		{
+			rewrite_sz = execute_edit_element_rule(__http_body, __http_body_len, edit_ctx->item, edit_ctx->n_item, &rewrite_buff, 1);
+		}
+
+		if (rewrite_sz >0 )
+		{
+			tfe_http_half_append_body(edit_ctx->editing, rewrite_buff, rewrite_sz, 0);
+			edit_ctx->actually_edited=1;
+		}
+		else
+		{
+			tfe_http_half_append_body(edit_ctx->editing, __http_body, __http_body_len, 0);
+		}
+
+		if (rewrite_buff != NULL)
+		{
+			FREE(&rewrite_buff);
+		}
+
+		if (edit_ctx->http_body != NULL)
+		{
+			evbuffer_free(edit_ctx->http_body);
+			edit_ctx->http_body = NULL;
+		}
+	}
+
+	if (events & EV_HTTP_RESP_END)
+	{
+		tfe_http_half_append_body(edit_ctx->editing, NULL, 0, 0);
+		edit_ctx->editing = NULL;
+	}
+}
+
 static void http_manipulate(const struct tfe_stream * stream, const struct tfe_http_session * session,
 	enum tfe_http_event events, const unsigned char * body_frag, size_t frag_size, struct pangu_http_ctx * ctx)
 {
@@ -2003,6 +2200,9 @@ static void http_manipulate(const struct tfe_stream * stream, const struct tfe_h
 		case MA_ACTION_INSERT:
 			http_insert(stream, session, events, body_frag, frag_size, ctx);
 			break;
+		case MA_ACTION_ELEMENT:
+			http_element(stream, session, events, body_frag, frag_size, ctx);
+			break;
 		default: assert(0);
 			break;
 	}
@@ -2512,6 +2712,21 @@ static inline int ctx_actually_inserted(struct pangu_http_ctx * ctx)
 	}
 }
 
+static inline int ctx_actually_edited(struct pangu_http_ctx * ctx)
+{
+
+	if(ctx->action == PG_ACTION_MANIPULATE &&
+	   ctx->param->action == MA_ACTION_ELEMENT && ctx->edit_ctx != NULL &&
+	   ctx->edit_ctx->actually_edited==1)
+	{
+		return 1;
+	}
+	else
+	{
+		return 0;
+	}
+}
+
 static inline int ctx_actually_manipulate(struct pangu_http_ctx * ctx)
 {
 	if(ctx->action == PG_ACTION_MANIPULATE &&
@@ -2570,12 +2785,9 @@ void pangu_on_http_end(const struct tfe_stream * stream,
 	}
 
 	if(ctx->action != PG_ACTION_NONE &&
-	   (((ctx_actually_replaced(ctx)) ||
-	   (ctx_actually_inserted(ctx)) ||
-	   (ctx_actually_manipulate(ctx))) ||
-	   (ctx->action == PG_ACTION_MONIT ||
-	   	ctx->action == PG_ACTION_REJECT ||
-	   	ctx->action == PG_ACTION_WHITELIST)))
+	   (((ctx_actually_replaced(ctx)) || (ctx_actually_inserted(ctx)) || (ctx_actually_edited(ctx)) ||
+	   (ctx_actually_manipulate(ctx))) || (ctx->action == PG_ACTION_MONIT ||
+	   	ctx->action == PG_ACTION_REJECT || ctx->action == PG_ACTION_WHITELIST)))
 	{
 		ret=pangu_send_log(g_pangu_rt->send_logger, &log_msg);
 		ATOMIC_ADD(&(g_pangu_rt->stat_val[STAT_LOG_NUM]), ret);

plugin/business/pangu-http/src/pangu_logger.cpp

@@ -122,7 +122,7 @@ int pangu_send_log(struct pangu_logger* handle, const struct pangu_log* log_msg)
 
 	const char *app_proto[]= {"unkonw","http1", "http2"};
 
-	const char *manipulate_action_map[]= {"redirect","block","replace","hijack","insert"};
+	const char *manipulate_action_map[]= {"redirect","block","replace","hijack","insert","element_edit"};
 
 	const char *panggu_action_map[__LG_ACTION_MAX];
 	panggu_action_map[LG_ACTION_MONIT]="monitor";