[搜索引擎searx]10分钟搭建一个好玩的python全文搜索引擎

10月 4, 2016 3条评论 40,145次阅读 10人点赞

源起

之前有一个群友在群里问个如何快速搭建一个搜索引擎，在搜索之后我看到了这个

代码所在

Git:https://github.com/asciimoo/searx

官方很贴心，很方便的是已经提供了docker 镜像，基本pull下来就可以很方便的使用了，执行命令

cid=$(sudo docker ps -a | grep searx | awk '{print $1}')
echo searx  cid is $cid
if [ "$cid" != "" ];then
    sudo docker stop $cid
    sudo docker rm $cid
fi
sudo docker run -d --name searx -e IMAGE_PROXY=True -e BASE_URL=http://yourdomain.com  -p 7777:8888 wonderfall/searx

cid=$(sudo docker ps -a | grep searx | awk '{print $1}')

echo searx cid is $cid

if [ "$cid" != "" ];then

sudo docker stop $cid

sudo docker rm $cid

sudo docker run -d --name searx -e IMAGE_PROXY=True -e BASE_URL=http://yourdomain.com -p 7777:8888 wonderfall/searx

然后就可以使用了,正常查看docker的状态，就可以正常的使用了

思考

怎么样，是不是很方便，我们先看看源码是怎么样实现的

https://github.com/asciimoo/searx/tree/master/searx/engines

我们打开里面的代码，其实本质就是将request之后的结果做一个大的聚合，至于数据来源，我们可以是来于DB,或者文件，我们可以看一下他的核心代码

from urllib import urlencode
from json import loads
from collections import Iterable

search_url = None
url_query = None
content_query = None
title_query = None
suggestion_query = ''
results_query = ''

# parameters for engines with paging support
#
# number of results on each page
# (only needed if the site requires not a page number, but an offset)
page_size = 1
# number of the first page (usually 0 or 1)
first_page_num = 1


def iterate(iterable):
    if type(iterable) == dict:
        it = iterable.iteritems()

    else:
        it = enumerate(iterable)
    for index, value in it:
        yield str(index), value


def is_iterable(obj):
    if type(obj) == str:
        return False
    if type(obj) == unicode:
        return False
    return isinstance(obj, Iterable)


def parse(query):
    q = []
    for part in query.split('/'):
        if part == '':
            continue
        else:
            q.append(part)
    return q


def do_query(data, q):
    ret = []
    if not q:
        return ret

    qkey = q[0]

    for key, value in iterate(data):

        if len(q) == 1:
            if key == qkey:
                ret.append(value)
            elif is_iterable(value):
                ret.extend(do_query(value, q))
        else:
            if not is_iterable(value):
                continue
            if key == qkey:
                ret.extend(do_query(value, q[1:]))
            else:
                ret.extend(do_query(value, q))
    return ret


def query(data, query_string):
    q = parse(query_string)

    return do_query(data, q)


def request(query, params):
    query = urlencode({'q': query})[2:]

    fp = {'query': query}
    if paging and search_url.find('{pageno}') >= 0:
        fp['pageno'] = (params['pageno'] - 1) * page_size + first_page_num

    params['url'] = search_url.format(**fp)
    params['query'] = query

    return params


def response(resp):
    results = []
    json = loads(resp.text)
    if results_query:
        for result in query(json, results_query)[0]:
            url = query(result, url_query)[0]
            title = query(result, title_query)[0]
            content = query(result, content_query)[0]
            results.append({'url': url, 'title': title, 'content': content})
    else:
        for url, title, content in zip(
            query(json, url_query),
            query(json, title_query),
            query(json, content_query)
        ):
            results.append({'url': url, 'title': title, 'content': content})

    if not suggestion_query:
        return results
    for suggestion in query(json, suggestion_query):
        results.append({'suggestion': suggestion})
    return results</pre>

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from urllib import urlencode

from json import loads

from collections import Iterable

search_url = None

url_query = None

content_query = None

title_query = None

suggestion_query = ''

results_query = ''

# parameters for engines with paging support

# number of results on each page

# (only needed if the site requires not a page number, but an offset)

page_size = 1

# number of the first page (usually 0 or 1)

first_page_num = 1

def iterate(iterable):

if type(iterable) == dict:

it = iterable.iteritems()

else:

it = enumerate(iterable)

for index, value in it:

yield str(index), value

def is_iterable(obj):

if type(obj) == str:

return False

if type(obj) == unicode:

return False

return isinstance(obj, Iterable)

def parse(query):

q = []

for part in query.split('/'):

if part == '':

continue

else:

q.append(part)

return q

def do_query(data, q):

ret = []

if not q:

return ret

qkey = q[0]

for key, value in iterate(data):

if len(q) == 1:

if key == qkey:

ret.append(value)

elif is_iterable(value):

ret.extend(do_query(value, q))

else:

if not is_iterable(value):

continue

if key == qkey:

ret.extend(do_query(value, q[1:]))

else:

ret.extend(do_query(value, q))

return ret

def query(data, query_string):

q = parse(query_string)

return do_query(data, q)

def request(query, params):

query = urlencode({'q': query})[2:]

fp = {'query': query}

if paging and search_url.find('{pageno}') >= 0:

fp['pageno'] = (params['pageno'] - 1) * page_size + first_page_num

params['url'] = search_url.format(**fp)

params['query'] = query

return params

def response(resp):

results = []

json = loads(resp.text)

if results_query:

for result in query(json, results_query)[0]:

url = query(result, url_query)[0]

title = query(result, title_query)[0]

content = query(result, content_query)[0]

results.append({'url': url, 'title': title, 'content': content})

else:

for url, title, content in zip(

query(json, url_query),

query(json, title_query),

query(json, content_query)

results.append({'url': url, 'title': title, 'content': content})

if not suggestion_query:

return results

for suggestion in query(json, suggestion_query):

results.append({'suggestion': suggestion})

return results</pre>

结果

每个response的时候我们都要以轻松的定制返回的数据（可以是网络，可以是数据库，可以是文件），那我们进一步想一下，如果我们可以hack response 结果，那我们完全可以将自己爬来的数据做为返回结果。如果是1024之类的，完全可以打造自己的“爱好”小引擎，代码我就不贴了，大家可以自己动手自己玩玩。结合jieba分词，可以更好玩一点。

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leo说道：

10月 5, 2016 8:13 上午

hack response 怎么理解?

回复
1. hi,I'm frank说道：
  
  10月 5, 2016 7:12 下午
  
  你好，就是简单的将他从网络请求来的结果改成你想要的数据返回方式，比如从数据库，或者文件
  
  回复
neos说道：

1月 2, 2017 7:55 下午

能分享一下群号吗？

回复