问题描述：
想下载 “https://wiki.wireshark.org/SampleCaptures?action=AttachFile&do=get&target=sys.pcap”，但是直接使用curl下载时确一直下载的是 ”https://wiki.wireshark.org/SampleCaptures“ 这个网页内容。
curl -O -s https://wiki.wireshark.org/SampleCaptures?action=AttachFile&do=get&target=sys.pcap
然后使用curl -v 查看详细信息，找出原因：
* Hostname was NOT found in DNS cache
* Trying 104.25.218.21...
* Connected to wiki.wireshark.org (104.25.218.21) port 443 (#0)
* successfully set certificate verify locations:
* CAfile: none
CApath: /etc/ssl/certs
* SSLv3, TLS handshake, Client hello (1):
* SSLv3, TLS handshake, Server hello (2):
* SSLv3, TLS handshake, CERT (11):
* SSLv3, TLS handshake, Server key exchange (12):
* SSLv3, TLS handshake, Server finished (14):
* SSLv3, TLS handshake, Client key exchange (16):
* SSLv3, TLS change cipher, Client hello (1):
* SSLv3, TLS handshake, Finished (20):
* SSLv3, TLS change cipher, Client hello (1):
* SSLv3, TLS handshake, Finished (20):
* SSL connection using ECDHE-ECDSA-AES128-GCM-SHA256
* Server certificate:
* subject: OU=Domain Control Validated; OU=PositiveSSL Multi-Domain; CN=ssl380445.cloudflaressl.com
* start date: 2016-12-27 00:00:00 GMT
* expire date: 2017-07-02 23:59:59 GMT
* subjectAltName: wiki.wireshark.org matched
* issuer: C=GB; ST=Greater Manchester; L=Salford; O=COMODO CA Limited; CN=COMODO ECC Domain Validation Secure Server CA 2
* SSL certificate verify ok.> GET /SampleCaptures?action=AttachFile HTTP/1.1
> User-Agent: curl/7.35.0
> Host: wiki.wireshark.org
> Accept: */*
>< HTTP/1.1 200 OK
... ...
说明curl请求的地址本身就不对，字符串被截断，至于为什么被截断，我也不知道。
解决方法：
添加引号到url两边，如下：
curl -O -s “https://wiki.wireshark.org/SampleCaptures?action=AttachFile&do=get&target=sys.pcap”
