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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,91 @@ | ||
| package request | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "strings" | ||
|
|
||
| "github.com/zmap/zgrab2/lib/http" | ||
| ) | ||
|
|
||
| type HttpRequestBuilder interface { | ||
| setUrl(url string) | ||
| setMethod(method string) error | ||
| setHeaders(headers http.Header) | ||
| Build(body string) (*http.Request, error) | ||
| } | ||
|
|
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| func NewHttpRequestBuilder(method, url string, headers http.Header) (HttpRequestBuilder, error) { | ||
| builder := new(httpProxyRequestBuilder) | ||
|
|
||
| err := builder.setMethod(method) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
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| builder.setUrl(url) | ||
| builder.setHeaders(headers) | ||
|
|
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| return builder, nil | ||
| } | ||
|
|
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| type httpProxyRequestBuilder struct { | ||
| method string | ||
| url string | ||
| headers http.Header | ||
| } | ||
|
|
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| func (builder *httpProxyRequestBuilder) setUrl(url string) { | ||
| if len(url) > 0 { | ||
| builder.url = fmt.Sprintf("http://%s", url) | ||
| return | ||
| } | ||
| builder.url = "/" | ||
| } | ||
|
|
||
| func (builder *httpProxyRequestBuilder) setMethod(method string) error { | ||
| allowed := []string{"GET", "POST"} // This is sufficient for proxies | ||
| for _, val := range allowed { | ||
| if val == method { | ||
| builder.method = method | ||
| return nil | ||
| } | ||
| } | ||
| return fmt.Errorf("method not allowed: %s", method) | ||
| } | ||
|
|
||
| func (builder *httpProxyRequestBuilder) setHeaders(headers http.Header) { | ||
| builder.headers = http.Header{ | ||
| "Accept": {"*/*"}, | ||
| "Proxy-Connection": {"close"}, | ||
| "Cache-Control": {"no-store"}, | ||
| } | ||
|
|
||
| if headers == nil { | ||
| return | ||
| } | ||
|
|
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| for k, v := range headers { | ||
| builder.headers[k] = v | ||
| } | ||
| } | ||
|
|
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| func (builder *httpProxyRequestBuilder) Build(body string) (*http.Request, error) { | ||
|
|
||
| // Add the body | ||
| var b *strings.Reader | ||
| if len(body) > 0 { | ||
| b = strings.NewReader(body) | ||
| } | ||
|
|
||
| // Create the request | ||
| req, err := http.NewRequest(builder.method, builder.url, b) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| // Add the headers | ||
| // The constructor does not add any header. | ||
| req.Header = builder.headers | ||
|
|
||
| return req, nil | ||
| } |
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