Set content-type and accept headers.

Source: R/headers.r

These are convenient wrappers aroud add_headers().

content_type(type)

content_type_json()

content_type_xml()

accept(type)

accept_json()

accept_xml()

Arguments

type

A mime type or a file extension. If a file extension (i.e. starts with .) will guess the mime type using mime::guess_type().

Details

accept_json/accept_xml and content_type_json/content_type_xml are useful shortcuts to ask for json or xml responses or tell the server you are sending json/xml.

Examples

GET("http://httpbin.org/headers")
#> Response [http://httpbin.org/headers]
#>   Date: 2020-03-11 04:10
#>   Status: 200
#>   Content-Type: application/json
#>   Size: 284 B
#> {
#>   "headers": {
#>     "Accept": "application/json, text/xml, application/xml, */*", 
#>     "Accept-Encoding": "deflate, gzip", 
#>     "Host": "httpbin.org", 
#>     "User-Agent": "libcurl/7.58.0 r-curl/4.3 httr/1.4.1", 
#>     "X-Amzn-Trace-Id": "Root=1-5e686499-23370d84f911646ae9b8fc3e"
#>   }
#> }

GET("http://httpbin.org/headers", accept_json())
#> Response [http://httpbin.org/headers]
#>   Date: 2020-03-11 04:10
#>   Status: 200
#>   Content-Type: application/json
#>   Size: 252 B
#> {
#>   "headers": {
#>     "Accept": "application/json", 
#>     "Accept-Encoding": "deflate, gzip", 
#>     "Host": "httpbin.org", 
#>     "User-Agent": "libcurl/7.58.0 r-curl/4.3 httr/1.4.1", 
#>     "X-Amzn-Trace-Id": "Root=1-5e686499-3394b9c28cd74428b19103e0"
#>   }
#> }
GET("http://httpbin.org/headers", accept("text/csv"))
#> Response [http://httpbin.org/headers]
#>   Date: 2020-03-11 04:10
#>   Status: 200
#>   Content-Type: application/json
#>   Size: 244 B
#> {
#>   "headers": {
#>     "Accept": "text/csv", 
#>     "Accept-Encoding": "deflate, gzip", 
#>     "Host": "httpbin.org", 
#>     "User-Agent": "libcurl/7.58.0 r-curl/4.3 httr/1.4.1", 
#>     "X-Amzn-Trace-Id": "Root=1-5e686499-36a80f12e232f00a6f3b38bc"
#>   }
#> }
GET("http://httpbin.org/headers", accept(".doc"))
#> Response [http://httpbin.org/headers]
#>   Date: 2020-03-11 04:10
#>   Status: 200
#>   Content-Type: application/json
#>   Size: 254 B
#> {
#>   "headers": {
#>     "Accept": "application/msword", 
#>     "Accept-Encoding": "deflate, gzip", 
#>     "Host": "httpbin.org", 
#>     "User-Agent": "libcurl/7.58.0 r-curl/4.3 httr/1.4.1", 
#>     "X-Amzn-Trace-Id": "Root=1-5e686499-bf01aca4d88e26c603fffb64"
#>   }
#> }

GET("http://httpbin.org/headers", content_type_xml())
#> Response [http://httpbin.org/headers]
#>   Date: 2020-03-11 04:10
#>   Status: 200
#>   Content-Type: application/json
#>   Size: 324 B
#> {
#>   "headers": {
#>     "Accept": "application/json, text/xml, application/xml, */*", 
#>     "Accept-Encoding": "deflate, gzip", 
#>     "Content-Type": "application/xml", 
#>     "Host": "httpbin.org", 
#>     "User-Agent": "libcurl/7.58.0 r-curl/4.3 httr/1.4.1", 
#>     "X-Amzn-Trace-Id": "Root=1-5e686499-b813110ec24737baa79f0380"
#>   }
#> }
GET("http://httpbin.org/headers", content_type("text/csv"))
#> Response [http://httpbin.org/headers]
#>   Date: 2020-03-11 04:10
#>   Status: 200
#>   Content-Type: application/json
#>   Size: 317 B
#> {
#>   "headers": {
#>     "Accept": "application/json, text/xml, application/xml, */*", 
#>     "Accept-Encoding": "deflate, gzip", 
#>     "Content-Type": "text/csv", 
#>     "Host": "httpbin.org", 
#>     "User-Agent": "libcurl/7.58.0 r-curl/4.3 httr/1.4.1", 
#>     "X-Amzn-Trace-Id": "Root=1-5e686499-490ea6d06f1ce19cfe6adf7c"
#>   }
#> }
GET("http://httpbin.org/headers", content_type(".xml"))
#> Response [http://httpbin.org/headers]
#>   Date: 2020-03-11 04:10
#>   Status: 200
#>   Content-Type: application/json
#>   Size: 324 B
#> {
#>   "headers": {
#>     "Accept": "application/json, text/xml, application/xml, */*", 
#>     "Accept-Encoding": "deflate, gzip", 
#>     "Content-Type": "application/xml", 
#>     "Host": "httpbin.org", 
#>     "User-Agent": "libcurl/7.58.0 r-curl/4.3 httr/1.4.1", 
#>     "X-Amzn-Trace-Id": "Root=1-5e686499-2b4196dade581a584e2fd486"
#>   }
#> }