1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
|
package svc // import "github.com/getwtxt/getwtxt/svc"
import (
"crypto/sha256"
"fmt"
"log"
"net/http"
"strconv"
"strings"
"github.com/getwtxt/registry"
"github.com/gorilla/mux"
)
func apiErrCheck(err error, r *http.Request) {
if err != nil {
uip := getIPFromCtx(r.Context())
log.Printf("*** %v :: %v %v :: %v\n", uip, r.Method, r.URL, err.Error())
}
}
func dedupe(list []string) []string {
out := []string{}
seen := make(map[string]bool)
for _, e := range list {
if !seen[e] {
out = append(out, e)
seen[e] = true
}
}
return out
}
// Takes the output of queries and formats it for
// an HTTP response. Iterates over the string slice,
// appending each entry to a byte slice, and adding
// newlines where appropriate.
func parseQueryOut(out []string) []byte {
var data []byte
for i, e := range out {
data = append(data, []byte(e)...)
if !strings.HasSuffix(e, "\n") && i != len(out)-1 {
data = append(data, byte('\n'))
}
}
return data
}
// apiEndpointQuery is called via apiEndpointHandler when
// the endpoint is "users" and r.FormValue("q") is not empty.
// It queries the registry cache for users or user URLs
// matching the term supplied via r.FormValue("q")
func apiEndpointQuery(w http.ResponseWriter, r *http.Request) error {
query := r.FormValue("q")
urls := r.FormValue("url")
pageVal := r.FormValue("page")
var out []string
var err error
pageVal = strings.TrimSpace(pageVal)
page, err := strconv.Atoi(pageVal)
errLog("", err)
vars := mux.Vars(r)
endpoint := vars["endpoint"]
// Handle user URL queries first, then nickname queries.
// Concatenate both outputs if they're both set.
// Also handle mention queries and status queries.
// If we made it this far and 'default' is matched,
// something went very wrong.
switch endpoint {
case "users":
var out2 []string
if query != "" {
out, err = twtxtCache.QueryUser(query)
apiErrCheck(err, r)
}
if urls != "" {
out2, err = twtxtCache.QueryUser(urls)
apiErrCheck(err, r)
}
if query != "" && urls != "" {
out = joinQueryOuts(out2)
}
case "mentions":
if urls == "" {
return fmt.Errorf("missing URL in mention query")
}
urls += ">"
out, err = twtxtCache.QueryInStatus(urls)
apiErrCheck(err, r)
case "tweets":
out = compositeStatusQuery(query, r)
default:
return fmt.Errorf("endpoint query, no cases match")
}
out = registry.ReduceToPage(page, out)
data := parseQueryOut(out)
etag := fmt.Sprintf("%x", sha256.Sum256(data))
w.Header().Set("ETag", etag)
w.Header().Set("Content-Type", txtutf8)
_, err = w.Write(data)
return err
}
func joinQueryOuts(data ...[]string) []string {
single := []string{}
for _, e := range data {
single = append(single, e...)
}
return dedupe(single)
}
func compositeStatusQuery(query string, r *http.Request) []string {
query = strings.ToLower(query)
out, err := twtxtCache.QueryInStatus(query)
apiErrCheck(err, r)
query = strings.Title(query)
out2, err := twtxtCache.QueryInStatus(query)
apiErrCheck(err, r)
query = strings.ToUpper(query)
out3, err := twtxtCache.QueryInStatus(query)
apiErrCheck(err, r)
final := joinQueryOuts(out, out2, out3)
return final
}
|