clust 0.9.0

An unofficial Rust client for the Anthropic/Claude API.
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

use crate::messages::chunk_stream::ChunkStream;
use crate::messages::{
    MessageChunk, MessagesError, MessagesRequestBody, MessagesResponseBody,
    StreamError, StreamOption,
};
use crate::ApiError;
use crate::Client;
use crate::ClientError;

use futures_core::Stream;

pub(crate) async fn create_a_message(
    client: &Client,
    request_body: MessagesRequestBody,
) -> Result<MessagesResponseBody, MessagesError> {
    // Validate stream option.
    if let Some(stream) = &request_body.stream {
        if *stream != StreamOption::ReturnOnce {
            return Err(MessagesError::StreamOptionMismatch);
        }
    }

    // Send the request.
    let response = client
        .post("https://api.anthropic.com/v1/messages")
        .json(&request_body)
        .send()
        .await
        .map_err(ClientError::HttpRequestError)?;

    // Check the response status code.
    let status_code = response.status();

    // Read the response text.
    let response_text = response
        .text()
        .await
        .map_err(ClientError::ReadResponseTextFailed)?;

    // Ok
    if status_code.is_success() {
        // Deserialize the response.
        serde_json::from_str(&response_text).map_err(|error| {
            {
                ClientError::ResponseDeserializationFailed {
                    error,
                    text: response_text,
                }
            }
            .into()
        })
    }
    // Error
    else {
        // Deserialize the error response.
        let error_response =
            serde_json::from_str(&response_text).map_err(|error| {
                ClientError::ErrorResponseDeserializationFailed {
                    error,
                    text: response_text,
                }
            })?;

        Err(ApiError::new(status_code, error_response).into())
    }
}

pub(crate) async fn create_a_message_stream(
    client: &Client,
    request_body: MessagesRequestBody,
) -> Result<impl Stream<Item = Result<MessageChunk, StreamError>>, MessagesError>
{
    // Validate stream option.
    if let None = &request_body.stream {
        return Err(MessagesError::StreamOptionMismatch);
    }
    if let Some(stream) = &request_body.stream {
        if *stream != StreamOption::ReturnStream {
            return Err(MessagesError::StreamOptionMismatch);
        }
    }

    // Send the request.
    let response = client
        .post("https://api.anthropic.com/v1/messages")
        .json(&request_body)
        .send()
        .await
        .map_err(ClientError::HttpRequestError)?;

    // Check the response status code.
    let status_code = response.status();

    // Ok
    if status_code.is_success() {
        // Create a chunk stream from response bytes stream.
        let byte_stream = response.bytes_stream();
        let chunk_stream = ChunkStream::new(byte_stream);
        Ok(chunk_stream)
    }
    // Error
    else {
        // Read the response text.
        let response_text = response
            .text()
            .await
            .map_err(ClientError::ReadResponseTextFailed)?;

        // Deserialize the error response.
        let error_response =
            serde_json::from_str(&response_text).map_err(|error| {
                ClientError::ErrorResponseDeserializationFailed {
                    error,
                    text: response_text,
                }
            })?;

        Err(ApiError::new(status_code, error_response).into())
    }
}