cURL does not work but same site works with browser

问题

what are the reasons for when using cURL form linux server to access the site return an error. but opening this site in chrome succeeds.

回答1:

Look browsers headers while sending your request, and add same headers to cURL request. Some servers needs some headers that browsers sends default but not cURL.

回答2:

To avoid/suppress SSL error, use -k flag, ie

curl -k ...

回答3:

I had 301 Moved Permanently error on curl but was working on browser.

But when I looked deeper there's Location to moved to location, which would be working. This coulde be when the server is using TLS.

$ curl -v http://www.shaharma.com/location/v1/US/zipcode/98104
*   Trying 172.111.99.100...
* TCP_NODELAY set
* Connected to www.shaharma.com (172.111.99.100) port 80 (#0)
> GET /location/v1/US/zipcode/98104 HTTP/1.1
> Host: www.shaharma.com
> User-Agent: curl/7.54.0
> Accept: */*
> 
< HTTP/1.1 301 Moved Permanently
< Content-Length: 0
< Location: https://www.shaharma.com/location/v1/US/zipcode/98104
< Cache-Control: max-age=0
< Expires: Fri, 01 Dec 2017 19:40:14 GMT
< Date: Fri, 01 Dec 2017 19:40:14 GMT
< Connection: Keep-Alive
< Set-Cookie: UID=52679eee-c06c-49fc-893a-69fd7e46bad0; expires=Fri, 25-Feb-2028 19:40:14 GMT; path=/; domain=.shaharma.com
< Set-Cookie: SID=1ada5fa9-0ace-4f4e-b75b-7a756b8da934; path=/; domain=.shaharma.com
< Set-Cookie: shaharma_loc_lb=p-loc-w; expires=Fri, 01-Dec-2017 19:50:14 GMT; path=/; domain=.shaharma.com
< Set-Cookie: bby_rdp=l; expires=Sat, 02-Dec-2017 19:40:14 GMT; path=/; domain=.shaharma.com
< 
* Connection #0 to host www.shaharma.com left intact

Also, you can goto brower and see the network which will have headers information.

来源：https://stackoverflow.com/questions/38160420/curl-does-not-work-but-same-site-works-with-browser