上下文
这是一个日志分析的事情。我正在创建一个regex
程序,以查找从客户端发送到服务器的某些请求的发生。我有包含这些请求的客户端日志文件以及其他日志。
问题: 当请求消息发送到服务器时,客户端应该有2个日志语句,如:
sending..
message_type
当上述语句或模式发现时我们可以说已经发送了一个请求。它是组合模式。确定
我们期待日志文件内容就像
sending..
message_type
...//other text
sending..
message_type
...//other text
sending..
message_type
从上面的日志我们可以说客户端发送了3条消息。但是在实际的日志文件中,模式如下所示重叠(不是针对所有消息,而是针对某些消息):
sending..(1)
...//other text
sending..(2)
message_type(2)
...//other text
message_type(1)
sending..(3)
message_type(3)
还有3个请求(我编号的消息要理解)。但是模式是重叠的。在完全记录第一条消息之前,记录了第二条消息。 以上说明是为了理解。以下是原始日志的一部分:
原始日志
Send message to server:
Created post notification log dir
Created post notification log dir
Created post notification log dir
Send message to server:
Created post notification log dir
<?xml version="1.0" encoding="UTF-8" standalone="yes"?><message schema_version="3644767c-2632-411a-9416-44f8a7dee08e"><request xaction_guid="new xaction guid" type="createsession"/></message>
INFO [a] - Server Response: <?xml version="1.0" encoding="UTF-8" standalone="yes"?><message schema_version="3644767c-2632-411a-9416-44f8a7dee08e"><response xaction_guid="new xaction guid" type="ok"></params></response></message>
<?xml version="1.0" encoding="UTF-8" standalone="yes"?><message schema_version="3644767c-2632-411a-9416-44f8a7dee08e"><request xaction_guid="new xaction guid" type="createsession"/></message>
INFO [a] - Server Response: <?xml version="1.0" encoding="UTF-8" standalone="yes"?><message schema_version="3644767c-2632-411a-9416-44f8a7dee08e"><response xaction_guid="new xaction guid" type="ok"></response></message>
根据解释,单个请求将以其两部分标识:
Send message to server:
<?xml version="1.0" encoding="UTF-8" standalone="yes"?><message schema_version="3644767c-2632-411a-9416-44f8a7dee08e"><request xaction_guid="new xaction guid" type="createsession"/></message>
我尝试了什么
public class LogMatcher {
static final String create_session= "Send message to server(.){10,1000}(<\\?xml(.){10,500}type=\"createsession\"(.){1,100}</message>)";
public static void main(String[] args) throws IOException {
BufferedReader reader = new BufferedReader(new InputStreamReader(new FileInputStream(new File("D:/dummy.txt"))));//I put the above log in this file
StringBuilder b = new StringBuilder();
String line = "";
while((line = reader.readLine()) != null ){
b.append(line);
}
findMatch(b,"Send message to server","Send message to server");
findMatch(b,create_session,"create_session");
}
private static int findMatch(StringBuilder b,String pattern, String type) {
int count =0;
Pattern regex = Pattern.compile(pattern,Pattern.MULTILINE);
Matcher regexMatcher = regex.matcher(b.toString());
while (regexMatcher.find()) {
count++;
}
System.out.printf("%25s%2d\n",type+": ",count);
return count;
}
}
当前输出
意图是找出发送的createsession
条消息的数量
Send message to server: 2
create_session: 1
预期输出
从日志中可以看出发送了2条消息。因此输出将是:
Send message to server: 2
create_session: 2
您可以在我的代码中看到我尝试过的模式。任何人都可以建议一种模式来获得理想的结果吗?
注意:可以简单地说为什么不单独使用计数Send message to server
。因为在日志中有许多类型的消息,如login, closesession
等。所有这些消息的第一部分都是Send message to server
。此外,他们还为其他目的单独记录了消息类型,因此我们无法继续任何部分(仅指我们可以继续传播的组合)
答案 0 :(得分:1)
查找从客户端发送到服务器的某些请求的发生。
你可以在这里忽略的“其他方式”,就像
Store in DB :
而不是Send message to server
和xml消息一样。
我提出了一个新策略:
type=\"createsession\"
xmls。Store in DB:
xmls,但忽略它们(不要递增计数器)。我们可以使用以下表达式来匹配发送到服务器的消息数。
^(?<toserver>Send message to server:)
regexMatcher.group("toserver")
来增加计数器。并将目标xmls独立匹配为:
^(?<message><\? *xml\b.{10,500} type *= *\"createsession\")
regexMatcher.group("message")
。那么,我们如何忽略 Store in DB:
xmls?我们可以匹配它们,而不是创建捕获。
^Store in DB ?:\r?\n(?:.*\n)*?<\? *xml\b.*
Store in DB :
匹配,后跟\r?\n(?:.*\n)*?
尽可能少的行,直到<\? *xml\b.*
它与第<?xml
行匹配<强>正则表达式强>
^(?:Store in DB ?:\r?\n(?:.*\n)*?<\? *xml\b.*|(?<toserver>Send message to server:)|(?<message><\? *xml\b.{10,500} type *= *\"createsession\"))
<强>代码强>
static final String create_session = "^(?:Store in DB ?:\\r?\\n(?:.*\\n)*?<\\? *xml\\b.*|(?<toserver>Send message to server:)|(?<message><\\? *xml\\b.{10,500} type *= *\\\"createsession\\\"))";
public static void main (String[] args) throws java.lang.Exception
{
//for testing purposes
final String text = "Send message to server:\nCreated post notification log dir\nCreated post notification log dir\nCreated post notification log dir\nSend message to server:\nCreated post notification log dir\n<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"yes\"?><message schema_version=\"3644767c-2632-411a-9416-44f8a7dee08e\"><request xaction_guid=\"new xaction guid\" type=\"createsession\"/></message>\nStore in DB :\n<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"yes\"?><message schema_version=\"3644767c-2632-411a-9416-44f8a7dee08e\"><request xaction_guid=\"new xaction guid\" type=\"createsession\"/></message>\nINFO [a] - Server Response: <?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"yes\"?><message schema_version=\"3644767c-2632-411a-9416-44f8a7dee08e\"><response xaction_guid=\"new xaction guid\" type=\"ok\"></params></response></message>\n<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"yes\"?><message schema_version=\"3644767c-2632-411a-9416-44f8a7dee08e\"><request xaction_guid=\"new xaction guid\" type=\"createsession\"/></message>\nINFO [a] - Server Response: <?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"yes\"?><message schema_version=\"3644767c-2632-411a-9416-44f8a7dee08e\"><response xaction_guid=\"new xaction guid\" type=\"ok\"></response></message>";
System.out.println("INPUT:\n" + text + "\n\nCOUNT:");
StringBuilder b = new StringBuilder();
b.append(text);
findMatch(b,create_session,"create_session");
}
private static int findMatch(StringBuilder b,String pattern, String type) {
int count =0; // counter for "Send message to server:"
int countType=0; // counter for "type=\"createsession\""
Pattern regex = Pattern.compile(pattern,Pattern.MULTILINE);
Matcher regexMatcher = regex.matcher(b.toString());
while (regexMatcher.find()) {
if (regexMatcher.group("toserver") != null) {
count++;
} else if (regexMatcher.group("message") != null) {
countType++;
} else {
// Ignoring "Store in DB :\n<?xml...."
}
}
System.out.printf("%25s%2d\n%25s%2d\n", "to server: ", count, type+": ", countType);
return countType;
}
<强>输出强>
INPUT:
Send message to server:
Created post notification log dir
Created post notification log dir
Created post notification log dir
Send message to server:
Created post notification log dir
<?xml version="1.0" encoding="UTF-8" standalone="yes"?><message schema_version="3644767c-2632-411a-9416-44f8a7dee08e"><request xaction_guid="new xaction guid" type="createsession"/></message>
Store in DB :
<?xml version="1.0" encoding="UTF-8" standalone="yes"?><message schema_version="3644767c-2632-411a-9416-44f8a7dee08e"><request xaction_guid="new xaction guid" type="createsession"/></message>
INFO [a] - Server Response: <?xml version="1.0" encoding="UTF-8" standalone="yes"?><message schema_version="3644767c-2632-411a-9416-44f8a7dee08e"><response xaction_guid="new xaction guid" type="ok"></params></response></message>
<?xml version="1.0" encoding="UTF-8" standalone="yes"?><message schema_version="3644767c-2632-411a-9416-44f8a7dee08e"><request xaction_guid="new xaction guid" type="createsession"/></message>
INFO [a] - Server Response: <?xml version="1.0" encoding="UTF-8" standalone="yes"?><message schema_version="3644767c-2632-411a-9416-44f8a7dee08e"><response xaction_guid="new xaction guid" type="ok"></response></message>
COUNT:
to server: 2
create_session: 2