diff --git "a/\347\254\254\344\272\214\346\234\237\350\256\255\347\273\203\350\220\245/2\347\217\255/2\347\217\255_chaos/\347\254\254\345\215\201\344\270\200\345\221\250_\347\254\254\344\270\211\350\212\202/.keep" "b/\347\254\254\344\272\214\346\234\237\350\256\255\347\273\203\350\220\245/2\347\217\255/2\347\217\255_chaos/\347\254\254\345\215\201\344\270\200\345\221\250_\347\254\254\344\270\211\350\212\202/.keep"
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git "a/\347\254\254\344\272\214\346\234\237\350\256\255\347\273\203\350\220\245/2\347\217\255/2\347\217\255_chaos/\347\254\254\345\215\201\344\270\200\345\221\250_\347\254\254\344\270\211\350\212\202/Redis.md" "b/\347\254\254\344\272\214\346\234\237\350\256\255\347\273\203\350\220\245/2\347\217\255/2\347\217\255_chaos/\347\254\254\345\215\201\344\270\200\345\221\250_\347\254\254\344\270\211\350\212\202/Redis.md"
new file mode 100644
index 0000000000000000000000000000000000000000..396c3eb71aaa8a76c61bfaacfb7dcf068fc88d25
--- /dev/null
+++ "b/\347\254\254\344\272\214\346\234\237\350\256\255\347\273\203\350\220\245/2\347\217\255/2\347\217\255_chaos/\347\254\254\345\215\201\344\270\200\345\221\250_\347\254\254\344\270\211\350\212\202/Redis.md"
@@ -0,0 +1,264 @@
+# Redis
+
+# Install
+
+### Install from source code on linux
+
+- Download
+    - use browser
+
+    - ```
+        wget http://download.redis.io/releases/redis-6.2.1.tar.gz
+        ```
+
+- Unzip
+
+    - ```
+        tar -zxvf redis-6.2.1.tar.gz
+        ```
+
+- Build
+
+    - ```
+        cd redis-6.2.1
+        make
+        ```
+
+    - If you get any error in running make command, run the following command
+
+        - Centos
+
+            ```
+            sudo yum groupinstall ‘Development Tools’
+            sudo yum install gcc make
+            ```
+
+        - Ubuntu
+
+            ```
+            sudo apt-get install build-essential
+            sudo apt-get gcc make
+            ```
+
+- Run `make test` to check if everything is ok and the `make test install`
+
+- Configure Redis server
+
+    ```
+    cd utils/
+    ./install_server.sh (Press Enter for default setting)
+    ```
+
+- Start Redis service
+
+    ```
+    # select redis port for this redis server instance. default is 6379
+    service redis_<port> start
+    ```
+
+- Connect from localhost
+
+    ```
+    root@chaos:~# redis-cli
+    127.0.0.1:6379>
+    ```
+
+- Connect remotely
+
+    - vi /etc/redis/6379.conf
+
+        ```
+        bind 127.0.0.1 192.168.111.111
+        ```
+
+    - restart redis service
+
+        ```
+        service redis_6379 restart
+        ```
+
+    - connect
+
+        ```
+        redis-cli -h 192.168.111.111 -p 6379
+        ```
+
+## Redis data type
+
+Redis-key
+
+```
+127.0.0.1:6379> keys *
+(empty array)
+127.0.0.1:6379> set name chaos
+OK
+127.0.0.1:6379> keys *
+1) "name"
+127.0.0.1:6379> exists name
+(integer) 1
+127.0.0.1:6379> exists age
+(integer) 0
+127.0.0.1:6379> type name
+string
+127.0.0.1:6379> del name
+(integer) 1
+127.0.0.1:6379> keys *
+(empty array)
+```
+
+### String
+
+- 使用场景：计数器，统计粉丝数，对象缓存存储
+
+```
+127.0.0.1:6379> set name chaos
+OK
+127.0.0.1:6379> get name
+"chaos"
+127.0.0.1:6379> append name wang
+(integer) 9
+127.0.0.1:6379> get name
+"chaoswang"
+127.0.0.1:6379> strlen name
+(integer) 9
+127.0.0.1:6379> del name
+(integer) 1
+127.0.0.1:6379> set name chaoswang
+OK
+127.0.0.1:6379> setrange name 2 c
+(integer) 9
+127.0.0.1:6379> get name
+"chcoswang"
+```
+
+### List
+
+- 可以把 list 用作 栈，队列，阻塞队列等
+- list 实际上是一个链表，前后都可以插入
+
+```
+127.0.0.1:6379> lpush list one
+(integer) 1
+127.0.0.1:6379> lpush list two
+(integer) 2
+127.0.0.1:6379> lpush list three
+(integer) 3
+127.0.0.1:6379> lrange list 0 2
+1) "three"
+2) "two"
+3) "one"
+127.0.0.1:6379> lpop list
+"three"
+127.0.0.1:6379> llen list
+(integer) 2
+127.0.0.1:6379> lrem list 2 two
+(integer) 1
+127.0.0.1:6379> lrange list 0 -1
+1) "one"
+127.0.0.1:6379> lset list 0 hello
+OK
+127.0.0.1:6379> lrange list 0 -1
+1) "hello"
+127.0.0.1:6379> linsert list after “hello” world
+```
+
+### Set
+
+```
+127.0.0.1:6379> sadd myset hello
+(integer) 1
+127.0.0.1:6379> sadd myset world
+(integer) 1
+127.0.0.1:6379> smembers myset
+1) "world"
+2) "hello"
+127.0.0.1:6379> sismember myset python
+(integer) 0
+127.0.0.1:6379> srem myset world
+(integer) 1
+127.0.0.1:6379> smembers myset
+1) "hello"
+127.0.0.1:6379> sadd myset python
+(integer) 1
+127.0.0.1:6379> smembers myset
+1) "python"
+2) "hello"
+127.0.0.1:6379> srandmember myset
+"hello"
+127.0.0.1:6379> srandmember myset
+"hello"
+127.0.0.1:6379> srandmember myset 2
+1) "python"
+2) "hello"
+127.0.0.1:6379> spop myset
+"hello"
+127.0.0.1:6379> smembers myset
+1) "python"
+127.0.0.1:6379>
+```
+
+### Zset
+
+```
+127.0.0.1:6379> zadd myzset 1 one
+(integer) 1
+127.0.0.1:6379> zadd myzset 2 two 3 three
+(integer) 2
+127.0.0.1:6379> zrange myzset 0 -1
+1) "one"
+2) "two"
+3) "three"
+127.0.0.1:6379> zadd myzset 5 five
+(integer) 1
+127.0.0.1:6379> zadd myzset 4 four
+(integer) 1
+127.0.0.1:6379> zrange myzset 0 -1
+1) "one"
+2) "two"
+3) "three"
+4) "four"
+5) "five"
+127.0.0.1:6379> zrem myzset one
+(integer) 1
+127.0.0.1:6379> zrange myzset 0 -1
+1) "two"
+2) "three"
+3) "four"
+4) "five"
+127.0.0.1:6379> zcount myzset 2 4
+(integer) 3
+127.0.0.1:6379>
+```
+
+### Hash
+
+Hash 适合存储经常变动的对象信息，String 更适合于存储字符串
+
+```
+127.0.0.1:6379> hset myhash field hello
+(integer) 1
+127.0.0.1:6379> hget myhash field
+"hello"
+127.0.0.1:6379> hdel myhash field
+(integer) 1
+127.0.0.1:6379> hget myhash field
+(nil)
+127.0.0.1:6379> hset myhash field hello field2 world field3 python
+(integer) 3
+127.0.0.1:6379> hkeys myhash
+1) "field"
+2) "field2"
+3) "field3"
+127.0.0.1:6379> hmget myhash field field1 field3
+1) "hello"
+2) (nil)
+3) "python"
+127.0.0.1:6379> hmget myhash field field2 field3
+1) "hello"
+2) "world"
+3) "python"
+127.0.0.1:6379>
+```
+
+
+
diff --git "a/\347\254\254\344\272\214\346\234\237\350\256\255\347\273\203\350\220\245/2\347\217\255/2\347\217\255_chaos/\347\254\254\345\215\201\344\270\200\345\221\250_\347\254\254\344\272\214\350\212\202/.keep" "b/\347\254\254\344\272\214\346\234\237\350\256\255\347\273\203\350\220\245/2\347\217\255/2\347\217\255_chaos/\347\254\254\345\215\201\344\270\200\345\221\250_\347\254\254\344\272\214\350\212\202/.keep"
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git "a/\347\254\254\344\272\214\346\234\237\350\256\255\347\273\203\350\220\245/2\347\217\255/2\347\217\255_chaos/\347\254\254\345\215\201\344\270\200\345\221\250_\347\254\254\344\272\214\350\212\202/jd_search_spider.py" "b/\347\254\254\344\272\214\346\234\237\350\256\255\347\273\203\350\220\245/2\347\217\255/2\347\217\255_chaos/\347\254\254\345\215\201\344\270\200\345\221\250_\347\254\254\344\272\214\350\212\202/jd_search_spider.py"
new file mode 100644
index 0000000000000000000000000000000000000000..862964f13f0a234de4e77bc7d891ec4634a2ac71
--- /dev/null
+++ "b/\347\254\254\344\272\214\346\234\237\350\256\255\347\273\203\350\220\245/2\347\217\255/2\347\217\255_chaos/\347\254\254\345\215\201\344\270\200\345\221\250_\347\254\254\344\272\214\350\212\202/jd_search_spider.py"
@@ -0,0 +1,64 @@
+import scrapy
+from bs4 import BeautifulSoup
+import json
+from W10_L3.jd_search.jd_search.items import JdSearchItem
+from twisted.internet.error import TimeoutError
+from scrapy.spidermiddlewares.httperror import HttpError
+
+
+class JdSearchSpider(scrapy.Spider):
+    name = "jd_search"
+
+    def start_requests(self):
+        search_array = ["手机", "电脑", "显卡", "内存"]
+        for keyword in search_array:
+            for page in range(1, 4):
+                url = f'https://search.jd.com/Search?keyword={keyword}&page={page}'
+
+                yield scrapy.FormRequest(
+                    dont_filter=False,
+                    url=url,
+                    method='GET',
+                    errback=self.err_back,
+                    callback=self.parse_search
+                )
+
+
+    def parse_search(self, response):
+        html = response.text
+        soup = BeautifulSoup(html, 'lxml')
+        content = soup.select("ul[class='gl-warp clearfix'] li[class='gl-item']")
+        for item in content:
+            try:
+                sku_id = item.attrs["data-sku"]
+                img = item.select("img[data-img='1']")
+                price = item.select("div[class='p-price']")
+                title = item.select("div[class='p-name p-name-type-2'] em")
+                shop = item.select("div[class='p-shop']")
+                icons = item.select("div[class='p-icons']")
+
+                img = img[0].attrs['data-lazy-img'] if img else ""
+                price = price[0].strong.i.text.strip() if price else ""
+                title = title[0].text.strip() if title else ""
+                shop = shop[0].text.strip() if shop else ""
+                icons = json.dumps([ele.text.strip() for ele in icons[0].select('i')]) if icons else '[]'
+
+                items = JdSearchItem()
+                items["sku_id"] = sku_id
+                items["img"] = img
+                items["price"] = price
+                items["title"] = title
+                items["shop"] = shop
+                items["icons"] = icons
+                yield items
+
+            except Exception as e:
+                print(e.args)
+
+
+    def err_back(self, failure):
+        if failure.check(TimeoutError):
+            print('Timeout error on %s website', failure.request.url)
+        elif failure.check(HttpError):
+            response = failure.value.response
+            print('HttpError on %s' % response.url)
\ No newline at end of file
diff --git "a/\347\254\254\344\272\214\346\234\237\350\256\255\347\273\203\350\220\245/2\347\217\255/2\347\217\255_chaos/\347\254\254\345\215\201\344\270\200\345\221\250_\347\254\254\344\272\214\350\212\202/middlewares.py" "b/\347\254\254\344\272\214\346\234\237\350\256\255\347\273\203\350\220\245/2\347\217\255/2\347\217\255_chaos/\347\254\254\345\215\201\344\270\200\345\221\250_\347\254\254\344\272\214\350\212\202/middlewares.py"
new file mode 100644
index 0000000000000000000000000000000000000000..3b6a2c4adc17a8ef5ebe27fcd44115514c3e2000
--- /dev/null
+++ "b/\347\254\254\344\272\214\346\234\237\350\256\255\347\273\203\350\220\245/2\347\217\255/2\347\217\255_chaos/\347\254\254\345\215\201\344\270\200\345\221\250_\347\254\254\344\272\214\350\212\202/middlewares.py"
@@ -0,0 +1,180 @@
+# Define here the models for your spider middleware
+#
+# See documentation in:
+# https://docs.scrapy.org/en/latest/topics/spider-middleware.html
+import hashlib
+import weakref
+
+from scrapy import signals
+
+# useful for handling different item types with a single interface
+from itemadapter import is_item, ItemAdapter
+from scrapy.downloadermiddlewares.retry import RetryMiddleware
+from scrapy.utils.response import response_status_message
+from scrapy.dupefilters import RFPDupeFilter
+from scrapy.utils.python import to_bytes
+from w3lib.url import canonicalize_url
+
+
+class JdSearchSpiderMiddleware:
+    # Not all methods need to be defined. If a method is not defined,
+    # scrapy acts as if the spider middleware does not modify the
+    # passed objects.
+
+    @classmethod
+    def from_crawler(cls, crawler):
+        # This method is used by Scrapy to create your spiders.
+        s = cls()
+        crawler.signals.connect(s.spider_opened, signal=signals.spider_opened)
+        return s
+
+    def process_spider_input(self, response, spider):
+        # Called for each response that goes through the spider
+        # middleware and into the spider.
+
+        # Should return None or raise an exception.
+        return None
+
+    def process_spider_output(self, response, result, spider):
+        # Called with the results returned from the Spider, after
+        # it has processed the response.
+
+        # Must return an iterable of Request, or item objects.
+        for i in result:
+            yield i
+
+    def process_spider_exception(self, response, exception, spider):
+        # Called when a spider or process_spider_input() method
+        # (from other spider middleware) raises an exception.
+
+        # Should return either None or an iterable of Request or item objects.
+        pass
+
+    def process_start_requests(self, start_requests, spider):
+        # Called with the start requests of the spider, and works
+        # similarly to the process_spider_output() method, except
+        # that it doesn’t have a response associated.
+
+        # Must return only requests (not items).
+        for r in start_requests:
+            yield r
+
+    def spider_opened(self, spider):
+        spider.logger.info('Spider opened: %s' % spider.name)
+
+
+class JdSearchDownloaderMiddleware:
+    # Not all methods need to be defined. If a method is not defined,
+    # scrapy acts as if the downloader middleware does not modify the
+    # passed objects.
+
+    @classmethod
+    def from_crawler(cls, crawler):
+        # This method is used by Scrapy to create your spiders.
+        s = cls()
+        crawler.signals.connect(s.spider_opened, signal=signals.spider_opened)
+        return s
+
+    def process_request(self, request, spider):
+        # Called for each request that goes through the downloader
+        # middleware.
+
+        # Must either:
+        # - return None: continue processing this request
+        # - or return a Response object
+        # - or return a Request object
+        # - or raise IgnoreRequest: process_exception() methods of
+        #   installed downloader middleware will be called
+        return None
+
+    def process_response(self, request, response, spider):
+        # Called with the response returned from the downloader.
+
+        # Must either;
+        # - return a Response object
+        # - return a Request object
+        # - or raise IgnoreRequest
+        return response
+
+    def process_exception(self, request, exception, spider):
+        # Called when a download handler or a process_request()
+        # (from other downloader middleware) raises an exception.
+
+        # Must either:
+        # - return None: continue processing this exception
+        # - return a Response object: stops process_exception() chain
+        # - return a Request object: stops process_exception() chain
+        pass
+
+    def spider_opened(self, spider):
+        spider.logger.info('Spider opened: %s' % spider.name)
+
+
+class JdSearchUAMiddleware:
+
+    def process_request(self, request, spider):
+        # This method is used by Scrapy to add user agent headers.
+        request.headers["user-agent"] = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.190 Safari/537.36"
+
+
+# W11_L1 Retry 中间件
+class JdSearchRetryMiddleware(RetryMiddleware):
+
+    def process_response(self, request, response, spider):
+        if request.meta.get('dont_retry', False):
+            return response
+        if "验证码" in response.text:
+            reason = response_status_message(response.status)
+            return self._retry(request, reason, spider) or response
+        return response
+
+    def process_exception(self, request, exception, spider):
+        if isinstance(exception, IndexError):
+            retry_times = request.meta.get('retry_times', 1)
+            request.meta['retry_time'] = retry_times - 1
+            return request
+
+
+# W11_L1 filter
+_fingerprint_cache = weakref.WeakKeyDictionary()
+class JdSearchRfpDupeMiddleware(RFPDupeFilter):
+    def request_fingerprint(self, request, include_headers=None, keep_fragments=False):
+        cache = _fingerprint_cache.setdefault(request, {})
+        cache_key = (include_headers, keep_fragments)
+        if cache_key not in cache:
+            fp = hashlib.sha1()
+            fp.update(to_bytes(request.method))
+            fp.update(to_bytes(canonicalize_url(request.url, keep_fragments=keep_fragments)))
+            fp.update(request.body or b'')
+            fp.update(request.meta.get("batch_no", "").encode("utf-8"))
+            cache[cache_key] = fp.hexdigest()
+        return cache[cache_key]
+
+
+# W11_L2 异常处理重试中间件,处理 http code 为 403/500 时候的异常
+from twisted.internet import defer
+from twisted.internet.error import DNSLookupError, TimeoutError, \
+    ConnectionLost, ConnectionDone, ConnectError, TCPTimedOutError, \
+    ConnectionRefusedError
+from scrapy.http import HtmlResponse
+from twisted.web.client import ResponseFailed
+from scrapy.core.downloader.handlers.http11 import TunnelError
+
+class ProcessAllExceptionMiddleware(object):
+    ALL_EXCEPTIONS = (defer.TimeoutError, TimeoutError, DNSLookupError,
+                           ConnectionRefusedError, ConnectionDone, ConnectError,
+                           ConnectionLost, TCPTimedOutError, ResponseFailed,
+                           IOError, TunnelError)
+
+    def process_response(self, request, response, spider):
+        if str(response.status).startswith('4') or str(response.status).startswith('5'):
+            response = HtmlResponse(url='')
+            return response
+        return response
+
+    def process_exception(self, request, exception, spider):
+        if isinstance(exception, self.ALL_EXCEPTIONS):
+            print("get exception %s" % exception)
+            response = HtmlResponse(url='exception')
+            return response
+        print("no exception")
\ No newline at end of file