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urlutil.go
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urlutil.go
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package urlutil
import (
"io"
"net/http"
"net/url"
"path"
"regexp"
"sort"
"strings"
"github.com/grokify/mogo/type/slicesutil"
)
// AppendValues appends one `url.Values` to another `url.Values`.
func AppendValues(v1, v2 url.Values, inclDuplicates bool) url.Values {
out := url.Values{}
if inclDuplicates {
for key, vals := range v1 {
out[key] = append(out[key], vals...)
}
for key, vals := range v2 {
out[key] = append(out[key], vals...)
}
return out
}
exists := map[string]map[string]int{}
for k, vals := range v1 {
if _, ok := exists[k]; !ok {
exists[k] = map[string]int{}
}
for _, v := range vals {
out.Add(k, v)
exists[k][v]++
}
}
for k, vals := range v2 {
for _, v := range vals {
if srcVals, ok := exists[k]; !ok {
out.Add(k, v)
} else if _, ok := srcVals[v]; !ok {
out.Add(k, v)
}
}
}
return out
}
// ToSlug creates a slug byte array from an input byte array.
// Slugs have words separated by a hyphen with no punctuation
// or spaces.
func ToSlug(slug []byte) []byte {
// Convert punctuation and spaces to hyphens: string([]byte{45}) = "-"
slug = regexp.MustCompile(`[[:punct:]\s_]+`).ReplaceAll(slug, []byte{45})
slug = regexp.MustCompile(`["']+`).ReplaceAll(slug, []byte{})
return regexp.MustCompile(`(^-+|-+$)`).ReplaceAll(slug, []byte{})
}
// ToSlugLowerString creates a lower-cased slug string
func ToSlugLowerString(s string) string {
return string(ToSlug([]byte(strings.ToLower(s))))
}
/*
// URLAddQueryMap returns a URL as a string from a base URL and a
// set of query parameters as a map[string]string{}
func URLAddQueryMapString(baseUrl string, queryParams map[string]string) (string, error) {
if len(queryParams) < 1 {
return baseUrl, nil
}
queryValues := map[string][]string{}
for key, val := range queryParams {
queryValues[key] = []string{val}
}
curUrl, err := URLAddQueryValues(baseUrl, queryValues)
if err != nil {
return baseUrl, err
}
return curUrl.String(), nil
}
// BuildURL returns a URL string from a base URL and url.Values.
func BuildURL(baseUrl string, queryValues url.Values) string {
qryString := queryValues.Encode()
if len(qryString) > 0 {
return baseUrl + "?" + qryString
}
return baseUrl
}
// BuildURLQueryString to be deprecated in favor of URLAddQueryString
func BuildURLQueryString(baseUrl string, qry any) string {
v, _ := query.Values(qry)
qryString := v.Encode()
if len(qryString) > 0 {
return baseUrl + "?" + qryString
}
return baseUrl
}
*/
func URLAddQuery(inputURL *url.URL, qry url.Values, inclDuplicates bool) *url.URL {
if len(qry) == 0 {
return inputURL
}
allQS := AppendValues(inputURL.Query(), qry, inclDuplicates)
inputURL.RawQuery = allQS.Encode()
return inputURL
}
func URLStringAddQuery(inputURL string, qry url.Values, inclDuplicates bool) (*url.URL, error) {
if goURL, err := url.Parse(inputURL); err != nil {
return nil, err
} else {
return URLAddQuery(goURL, qry, inclDuplicates), nil
}
}
// GetURLBody returns an HTTP response byte array body from a URL.
func GetURLBody(absoluteURL string) ([]byte, error) {
req, err := http.NewRequest(http.MethodGet, absoluteURL, nil)
if err != nil {
return []byte{}, err
}
cli := &http.Client{}
res, err := cli.Do(req)
if err != nil {
return []byte{}, err
}
defer res.Body.Close()
return io.ReadAll(res.Body)
}
// GetURLPostBody returns a HTTP post body as a byte array from a
// URL, body type and an io.Reader.
func GetURLPostBody(absoluteURL string, bodyType string, reqBody io.Reader) ([]byte, error) {
client := &http.Client{}
res, err := client.Post(absoluteURL, bodyType, reqBody)
if err != nil {
return []byte{}, err
}
defer res.Body.Close()
return io.ReadAll(res.Body)
}
// JoinAbsolute performs a path.Join() while preserving two slashes after the scheme.
func JoinAbsolute(elem ...string) string {
return regexp.MustCompile(`^([A-Za-z]+:/)`).ReplaceAllString(path.Join(elem...), "${1}/")
}
// Join returns joining URL paths parts.
func Join(elem ...string) string {
return rxFwdSlashMore.ReplaceAllString(
strings.Join(elem, "/"), "/")
}
var (
rxURIScheme *regexp.Regexp = regexp.MustCompile(`^([A-Za-z][0-9A-Za-z]*:/)`)
rxFwdSlashMore *regexp.Regexp = regexp.MustCompile(`/+`)
)
// CondenseURI trims spaces and condenses slashes.
func CondenseURI(uri string) string {
return rxURIScheme.ReplaceAllString(
rxFwdSlashMore.ReplaceAllString(strings.TrimSpace(uri), "/"),
"${1}/")
}
// URLValuesEncodeSorted returns and encoded string with sorting
func URLValuesEncodeSorted(v url.Values, priorities []string) string {
encoded := []string{}
priorityKeys := map[string]int{}
priorities = slicesutil.Dedupe(priorities)
for _, key := range priorities {
if vals, ok := v[key]; ok {
sort.Strings(vals)
for _, val := range vals {
qry := url.QueryEscape(key) + "=" + url.QueryEscape(val)
encoded = append(encoded, qry)
}
}
priorityKeys[key] = 1
}
sortedKeys := []string{}
for k := range v {
if _, ok := priorityKeys[k]; !ok {
sortedKeys = append(sortedKeys, k)
}
}
sort.Strings(sortedKeys)
for _, key := range sortedKeys {
if vals, ok := v[key]; ok {
sort.Strings(vals)
for _, val := range vals {
qry := url.QueryEscape(key) + "=" + url.QueryEscape(val)
encoded = append(encoded, qry)
}
}
}
return strings.Join(encoded, "&")
}