ipfs-api 0.7.1

Implementation of an IPFS HTTP API client
Documentation 
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

// Copyright 2017 rust-ipfs-api Developers
//
// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
// http://opensource.org/licenses/MIT>, at your option. This file may not be
// copied, modified, or distributed except according to those terms.
//

use crate::serde::de::{Deserialize, Deserializer, MapAccess, SeqAccess, Visitor};
use std::collections::HashMap;
use std::error::Error;
use std::fmt;
use std::marker::PhantomData;

pub struct IntegerVisitor;

impl<'de> Visitor<'de> for IntegerVisitor {
    type Value = i64;

    fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
        formatter.write_str("integer")
    }

    fn visit_i8<E>(self, num: i8) -> Result<Self::Value, E>
    where
        E: Error,
    {
        Ok(num.into())
    }

    fn visit_i32<E>(self, num: i32) -> Result<Self::Value, E>
    where
        E: Error,
    {
        Ok(num.into())
    }

    fn visit_i64<E>(self, num: i64) -> Result<Self::Value, E>
    where
        E: Error,
    {
        Ok(num)
    }

    fn visit_u8<E>(self, num: u8) -> Result<Self::Value, E>
    where
        E: Error,
    {
        Ok(num.into())
    }

    fn visit_u32<E>(self, num: u32) -> Result<Self::Value, E>
    where
        E: Error,
    {
        Ok(num.into())
    }

    fn visit_u64<E>(self, num: u64) -> Result<Self::Value, E>
    where
        E: Error,
    {
        Ok(num as i64)
    }
}

/// Deserializes a sequence or null values as a vec.
///
pub fn deserialize_vec<'de, T, D>(deserializer: D) -> Result<Vec<T>, D::Error>
where
    D: Deserializer<'de>,
    T: Deserialize<'de>,
{
    // Visits a sequence or null type, returning either the sequence
    // or an empty vector.
    //
    struct VecVisitor<T>(PhantomData<T>);

    impl<'de, T> Visitor<'de> for VecVisitor<T>
    where
        T: Deserialize<'de>,
    {
        type Value = Vec<T>;

        fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
            formatter.write_str("sequence or unit")
        }

        fn visit_seq<A>(self, mut seq: A) -> Result<Self::Value, A::Error>
        where
            A: SeqAccess<'de>,
        {
            let mut vec = Vec::new();

            while let Some(item) = seq.next_element()? {
                vec.push(item);
            }

            Ok(vec)
        }

        fn visit_none<E>(self) -> Result<Self::Value, E>
        where
            E: Error,
        {
            Ok(Default::default())
        }

        fn visit_some<D>(self, deserializer: D) -> Result<Self::Value, D::Error>
        where
            D: Deserializer<'de>,
        {
            deserializer.deserialize_seq(VecVisitor(PhantomData))
        }
    }

    deserializer.deserialize_option(VecVisitor(PhantomData))
}

/// Deserializes a map or null values as a HashMap.
///
pub fn deserialize_hashmap<'de, T, D>(deserializer: D) -> Result<HashMap<String, T>, D::Error>
where
    D: Deserializer<'de>,
    T: Deserialize<'de>,
{
    // Visits a map or null type, returning either the mapping
    // or an empty HashMap.
    //
    struct MapVisitor<T>(PhantomData<T>);

    impl<'de, T> Visitor<'de> for MapVisitor<T>
    where
        T: Deserialize<'de>,
    {
        type Value = HashMap<String, T>;

        fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
            formatter.write_str("map or unit")
        }

        fn visit_map<A>(self, mut map: A) -> Result<Self::Value, A::Error>
        where
            A: MapAccess<'de>,
        {
            let mut hashmap = HashMap::new();

            while let Some((key, value)) = map.next_entry()? {
                hashmap.insert(key, value);
            }

            Ok(hashmap)
        }

        fn visit_none<E>(self) -> Result<Self::Value, E>
        where
            E: Error,
        {
            Ok(Default::default())
        }

        fn visit_some<D>(self, deserializer: D) -> Result<Self::Value, D::Error>
        where
            D: Deserializer<'de>,
        {
            deserializer.deserialize_map(MapVisitor(PhantomData))
        }
    }

    deserializer.deserialize_option(MapVisitor(PhantomData))
}