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
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
|
use crate::EntityType;
use anyhow::{anyhow, Result};
use log::{self, info};
use serde_json::json;
use std::time::Duration;
pub struct SearchResults {
pub entity_type: EntityType,
pub limit: Option<u64>,
pub count: u64,
pub took_ms: u64,
offset: u64,
batch: Vec<serde_json::Value>,
scroll_id: Option<String>,
scroll_url: String,
http_client: reqwest::Client,
}
impl Iterator for SearchResults {
type Item = Result<serde_json::Value>;
fn next(&mut self) -> Option<Result<serde_json::Value>> {
// if we already hit limit, bail early
if let Some(l) = self.limit {
if self.offset >= l {
return None;
}
}
// if current batch is empty, and we are scrolling, refill the current batch
if self.batch.is_empty() && self.scroll_id.is_some() {
let response = self
.http_client
.get(&self.scroll_url)
.header("Content-Type", "application/json")
.body(
json!({
"scroll": "2m",
"scroll_id": self.scroll_id.clone().unwrap(),
})
.to_string(),
)
.send();
let mut response = match response {
Err(e) => return Some(Err(e.into())),
Ok(v) => v,
};
if !response.status().is_success() {
return Some(Err(anyhow!("search error, status={}", response.status())));
};
let body: serde_json::Value = match response.json() {
Err(e) => return Some(Err(e.into())),
Ok(v) => v,
};
self.scroll_id = Some(body["_scroll_id"].as_str().unwrap().to_string());
self.batch = body["hits"]["hits"].as_array().unwrap().to_vec();
}
// return next hit from the most recent batch
if !self.batch.is_empty() {
self.offset += 1;
let val = self.batch.pop().unwrap();
let source = val["_source"].clone();
return Some(Ok(source));
}
// if batch is empty and couldn't be refilled, terminate
// TODO: should we raise error if ended early?
None
}
}
pub fn crude_search(
api_host: &str,
entity_type: EntityType,
limit: Option<u64>,
terms: Vec<String>,
) -> Result<SearchResults> {
let index = match entity_type {
EntityType::Release => "fatcat_release",
EntityType::File => "fatcat_file",
EntityType::Container => "fatcat_container",
_ => {
return Err(anyhow!(
"No search index for entity type: {:?}",
entity_type
))
}
};
let http_client = reqwest::Client::builder()
.timeout(Duration::from_secs(10))
.danger_accept_invalid_certs(true)
.build()
.expect("ERROR :: Could not build reqwest client");
let query: String = if terms.is_empty() {
"*".to_string()
} else {
terms.join(" ")
};
info!("Search query string: {}", query);
let request_url = format!("{}/{}/_search", api_host, index);
let scroll_url = format!("{}/_search/scroll", api_host);
// sort by _doc for (potentially) very large result sets
let (scroll_mode, sort_mode, size) = match limit {
None => (true, "_doc", 100),
Some(l) if l > 100 => (true, "_doc", 100),
Some(l) => (false, "_score", l),
};
let query_body = json!({
"query": {
"boosting": {
"positive": {
"bool": {
"must": {
"query_string": {
"query": query,
"default_operator": "AND",
"analyze_wildcard": true,
"allow_leading_wildcard": false,
"lenient": true,
"fields": [
"title^2",
"biblio",
],
},
},
"should": {
"term": { "in_ia": true },
},
},
},
"negative": {
"bool": {
"should": [
{"bool": { "must_not" : { "exists": { "field": "title" }}}},
{"bool": { "must_not" : { "exists": { "field": "year" }}}},
{"bool": { "must_not" : { "exists": { "field": "type" }}}},
{"bool": { "must_not" : { "exists": { "field": "stage" }}}},
],
},
},
"negative_boost": 0.5,
},
},
"size": size,
"sort": [ sort_mode ],
})
.to_string();
let mut request = http_client
.get(&request_url)
.header("Content-Type", "application/json")
.body(query_body);
if scroll_mode {
request = request.query(&[("scroll", "2m")]);
}
let mut response = request.send()?;
if !response.status().is_success() {
return Err(anyhow!("search error, status={}", response.status()));
}
//println!("{:?}", response);
let body: serde_json::Value = response.json()?;
let scroll_id = if scroll_mode {
Some(body["_scroll_id"].as_str().unwrap().to_string())
} else {
None
};
Ok(SearchResults {
entity_type,
limit,
count: body["hits"]["total"].as_u64().unwrap(),
took_ms: body["took"].as_u64().unwrap(),
offset: 0,
batch: body["hits"]["hits"].as_array().unwrap().to_vec(),
scroll_id,
scroll_url,
http_client,
})
}
|
