because scrapy"s own FilePipeline is named by downloading the hash code of url, you want to customize your own filepipeline, to rename the file. So google for a while, found that everyone said: inherit the FilesPipeline class and then rewrite the get_media_requests and file_path methods, the approximate code is as follows:
2018-04-02 17:14:46 [scrapy.middleware] INFO: Enabled downloader middlewares:
["scrapy.downloadermiddlewares.httpauth.HttpAuthMiddleware",
"scrapy.downloadermiddlewares.downloadtimeout.DownloadTimeoutMiddleware",
"scrapy.downloadermiddlewares.defaultheaders.DefaultHeadersMiddleware",
"scrapy.downloadermiddlewares.useragent.UserAgentMiddleware",
"scrapy.downloadermiddlewares.retry.RetryMiddleware",
"scrapy.downloadermiddlewares.redirect.MetaRefreshMiddleware",
"scrapy.downloadermiddlewares.httpcompression.HttpCompressionMiddleware",
"scrapy.downloadermiddlewares.redirect.RedirectMiddleware",
"scrapy.downloadermiddlewares.cookies.CookiesMiddleware",
"scrapy.downloadermiddlewares.httpproxy.HttpProxyMiddleware",
"scrapy.downloadermiddlewares.stats.DownloaderStats"]
2018-04-02 17:14:46 [scrapy.middleware] INFO: Enabled spider middlewares:
["scrapy.spidermiddlewares.httperror.HttpErrorMiddleware",
"scrapy.spidermiddlewares.offsite.OffsiteMiddleware",
"scrapy.spidermiddlewares.referer.RefererMiddleware",
"scrapy.spidermiddlewares.urllength.UrlLengthMiddleware",
"scrapy.spidermiddlewares.depth.DepthMiddleware"]
2018-04-02 17:14:46 [scrapy.middleware] INFO: Enabled item pipelines:
["cszgSpider.pipelines.MyfilesPipeline",
"cszgSpider.pipelines.CszgspiderPipeline"]
2018-04-02 17:14:46 [scrapy.core.engine] INFO: Spider opened
2018-04-02 17:14:46 [scrapy.extensions.logstats] INFO: Crawled 0 pages (at 0 pages/min), scraped 0 items (at 0 items/min)
2018-04-02 17:14:46 [scrapy.extensions.telnet] DEBUG: Telnet console listening on 127.0.0.1:6023
2018-04-02 17:14:46 [scrapy.core.engine] DEBUG: Crawled (200) <GET http://cishan.chinanpo.gov.cn/biz/ma/csmh/d/csmhddoSort.html?pageNo=1&search_condit=&sort=desc&flag=0> (referer: None)
2018-04-02 17:14:47 [scrapy.core.scraper] DEBUG: Scraped from <200 http://cishan.chinanpo.gov.cn/biz/ma/csmh/d/csmhddoSort.html?pageNo=1&search_condit=&sort=desc&flag=0>
{"file_urls": ["http://cishan.chinanpo.gov.cn/mz/upload/pub/load/resource_download.html?resourceid=ff80808162718ac70162854c92690082",
"http://cishan.chinanpo.gov.cn/mz/upload/pub/load/resource_download.html?resourceid=ff808081627192280162853fdb1501e1",
"http://cishan.chinanpo.gov.cn/mz/upload/pub/load/resource_download.html?resourceid=ff80808162718ac701627b3fd553004f",
"http://cishan.chinanpo.gov.cn/mz/upload/pub/load/resource_download.html?resourceid=ff80808162718ac7016275e8bcda0039",
"http://cishan.chinanpo.gov.cn/mz/upload/pub/load/resource_download.html?resourceid=ff80808162718ac7016275d0c49e002d",
"http://cishan.chinanpo.gov.cn/mz/upload/pub/load/resource_download.html?resourceid=ff80808162719228016275c014f700dc",
"http://cishan.chinanpo.gov.cn/mz/upload/pub/load/resource_download.html?resourceid=ff80808162719228016275a2d33d00c6",
"http://cishan.chinanpo.gov.cn/mz/upload/pub/load/resource_download.html?resourceid=ff8080816271922801627551a95d00af",
"http://cishan.chinanpo.gov.cn/mz/upload/pub/load/resource_download.html?resourceid=ff80808162719228016274eb5c5300a3",
"http://cishan.chinanpo.gov.cn/mz/upload/pub/load/resource_download.html?resourceid=ff8080816271922801627453688d000d"],
"files": []}
2018-04-02 17:14:47 [scrapy.core.engine] INFO: Closing spider (finished)
2018-04-02 17:14:47 [scrapy.statscollectors] INFO: Dumping Scrapy stats:
{"downloader/request_bytes": 518,
"downloader/request_count": 1,
"downloader/request_method_count/GET": 1,
"downloader/response_bytes": 12444,
"downloader/response_count": 1,
"downloader/response_status_count/200": 1,
"finish_reason": "finished",
"finish_time": datetime.datetime(2018, 4, 2, 9, 14, 47, 11611),
"item_scraped_count": 1,
"log_count/DEBUG": 3,
"log_count/INFO": 7,
"response_received_count": 1,
"scheduler/dequeued": 1,
"scheduler/dequeued/memory": 1,
"scheduler/enqueued": 1,
"scheduler/enqueued/memory": 1,
"start_time": datetime.datetime(2018, 4, 2, 9, 14, 46, 433082)}
2018-04-02 17:14:47 [scrapy.core.engine] INFO: Spider closed (finished)I have all the download links, but I don"t seem to have started the download. Why?