1mod supported_countries;
2
3use anyhow::{Result, anyhow, bail};
4use futures::{AsyncBufReadExt, AsyncReadExt, StreamExt, io::BufReader, stream::BoxStream};
5use http_client::{AsyncBody, HttpClient, Method, Request as HttpRequest};
6use serde::{Deserialize, Serialize};
7
8pub use supported_countries::*;
9
10pub const API_URL: &str = "https://generativelanguage.googleapis.com";
11
12pub async fn stream_generate_content(
13 client: &dyn HttpClient,
14 api_url: &str,
15 api_key: &str,
16 mut request: GenerateContentRequest,
17) -> Result<BoxStream<'static, Result<GenerateContentResponse>>> {
18 if request.contents.is_empty() {
19 bail!("Request must contain at least one content item");
20 }
21
22 if let Some(user_content) = request
23 .contents
24 .iter()
25 .find(|content| content.role == Role::User)
26 {
27 if user_content.parts.is_empty() {
28 bail!("User content must contain at least one part");
29 }
30 }
31
32 let uri = format!(
33 "{api_url}/v1beta/models/{model}:streamGenerateContent?alt=sse&key={api_key}",
34 model = request.model
35 );
36 request.model.clear();
37
38 let request_builder = HttpRequest::builder()
39 .method(Method::POST)
40 .uri(uri)
41 .header("Content-Type", "application/json");
42
43 let request = request_builder.body(AsyncBody::from(serde_json::to_string(&request)?))?;
44 let mut response = client.send(request).await?;
45 if response.status().is_success() {
46 let reader = BufReader::new(response.into_body());
47 Ok(reader
48 .lines()
49 .filter_map(|line| async move {
50 match line {
51 Ok(line) => {
52 if let Some(line) = line.strip_prefix("data: ") {
53 match serde_json::from_str(line) {
54 Ok(response) => Some(Ok(response)),
55 Err(error) => Some(Err(anyhow!(error))),
56 }
57 } else {
58 None
59 }
60 }
61 Err(error) => Some(Err(anyhow!(error))),
62 }
63 })
64 .boxed())
65 } else {
66 let mut text = String::new();
67 response.body_mut().read_to_string(&mut text).await?;
68 Err(anyhow!(
69 "error during streamGenerateContent, status code: {:?}, body: {}",
70 response.status(),
71 text
72 ))
73 }
74}
75
76pub async fn count_tokens(
77 client: &dyn HttpClient,
78 api_url: &str,
79 api_key: &str,
80 request: CountTokensRequest,
81) -> Result<CountTokensResponse> {
82 let uri = format!(
83 "{}/v1beta/models/gemini-pro:countTokens?key={}",
84 api_url, api_key
85 );
86 let request = serde_json::to_string(&request)?;
87
88 let request_builder = HttpRequest::builder()
89 .method(Method::POST)
90 .uri(&uri)
91 .header("Content-Type", "application/json");
92
93 let http_request = request_builder.body(AsyncBody::from(request))?;
94 let mut response = client.send(http_request).await?;
95 let mut text = String::new();
96 response.body_mut().read_to_string(&mut text).await?;
97 if response.status().is_success() {
98 Ok(serde_json::from_str::<CountTokensResponse>(&text)?)
99 } else {
100 Err(anyhow!(
101 "error during countTokens, status code: {:?}, body: {}",
102 response.status(),
103 text
104 ))
105 }
106}
107
108#[derive(Debug, Serialize, Deserialize)]
109pub enum Task {
110 #[serde(rename = "generateContent")]
111 GenerateContent,
112 #[serde(rename = "streamGenerateContent")]
113 StreamGenerateContent,
114 #[serde(rename = "countTokens")]
115 CountTokens,
116 #[serde(rename = "embedContent")]
117 EmbedContent,
118 #[serde(rename = "batchEmbedContents")]
119 BatchEmbedContents,
120}
121
122#[derive(Debug, Serialize, Deserialize)]
123#[serde(rename_all = "camelCase")]
124pub struct GenerateContentRequest {
125 #[serde(default, skip_serializing_if = "String::is_empty")]
126 pub model: String,
127 pub contents: Vec<Content>,
128 pub system_instruction: Option<SystemInstruction>,
129 pub generation_config: Option<GenerationConfig>,
130 pub safety_settings: Option<Vec<SafetySetting>>,
131 #[serde(skip_serializing_if = "Option::is_none")]
132 pub tools: Option<Vec<Tool>>,
133 #[serde(skip_serializing_if = "Option::is_none")]
134 pub tool_config: Option<ToolConfig>,
135}
136
137#[derive(Debug, Serialize, Deserialize)]
138#[serde(rename_all = "camelCase")]
139pub struct GenerateContentResponse {
140 pub candidates: Option<Vec<GenerateContentCandidate>>,
141 pub prompt_feedback: Option<PromptFeedback>,
142 pub usage_metadata: Option<UsageMetadata>,
143}
144
145#[derive(Debug, Serialize, Deserialize)]
146#[serde(rename_all = "camelCase")]
147pub struct GenerateContentCandidate {
148 pub index: Option<usize>,
149 pub content: Content,
150 pub finish_reason: Option<String>,
151 pub finish_message: Option<String>,
152 pub safety_ratings: Option<Vec<SafetyRating>>,
153 pub citation_metadata: Option<CitationMetadata>,
154}
155
156#[derive(Debug, Serialize, Deserialize)]
157#[serde(rename_all = "camelCase")]
158pub struct Content {
159 pub parts: Vec<Part>,
160 pub role: Role,
161}
162
163#[derive(Debug, Serialize, Deserialize)]
164#[serde(rename_all = "camelCase")]
165pub struct SystemInstruction {
166 pub parts: Vec<Part>,
167}
168
169#[derive(Debug, PartialEq, Deserialize, Serialize)]
170#[serde(rename_all = "camelCase")]
171pub enum Role {
172 User,
173 Model,
174}
175
176#[derive(Debug, Serialize, Deserialize)]
177#[serde(untagged)]
178pub enum Part {
179 TextPart(TextPart),
180 InlineDataPart(InlineDataPart),
181 FunctionCallPart(FunctionCallPart),
182 FunctionResponsePart(FunctionResponsePart),
183}
184
185#[derive(Debug, Serialize, Deserialize)]
186#[serde(rename_all = "camelCase")]
187pub struct TextPart {
188 pub text: String,
189}
190
191#[derive(Debug, Serialize, Deserialize)]
192#[serde(rename_all = "camelCase")]
193pub struct InlineDataPart {
194 pub inline_data: GenerativeContentBlob,
195}
196
197#[derive(Debug, Serialize, Deserialize)]
198#[serde(rename_all = "camelCase")]
199pub struct GenerativeContentBlob {
200 pub mime_type: String,
201 pub data: String,
202}
203
204#[derive(Debug, Serialize, Deserialize)]
205#[serde(rename_all = "camelCase")]
206pub struct FunctionCallPart {
207 pub function_call: FunctionCall,
208}
209
210#[derive(Debug, Serialize, Deserialize)]
211#[serde(rename_all = "camelCase")]
212pub struct FunctionResponsePart {
213 pub function_response: FunctionResponse,
214}
215
216#[derive(Debug, Serialize, Deserialize)]
217#[serde(rename_all = "camelCase")]
218pub struct CitationSource {
219 pub start_index: Option<usize>,
220 pub end_index: Option<usize>,
221 pub uri: Option<String>,
222 pub license: Option<String>,
223}
224
225#[derive(Debug, Serialize, Deserialize)]
226#[serde(rename_all = "camelCase")]
227pub struct CitationMetadata {
228 pub citation_sources: Vec<CitationSource>,
229}
230
231#[derive(Debug, Serialize, Deserialize)]
232#[serde(rename_all = "camelCase")]
233pub struct PromptFeedback {
234 pub block_reason: Option<String>,
235 pub safety_ratings: Vec<SafetyRating>,
236 pub block_reason_message: Option<String>,
237}
238
239#[derive(Debug, Serialize, Deserialize, Default)]
240#[serde(rename_all = "camelCase")]
241pub struct UsageMetadata {
242 pub prompt_token_count: Option<usize>,
243 pub cached_content_token_count: Option<usize>,
244 pub candidates_token_count: Option<usize>,
245 pub tool_use_prompt_token_count: Option<usize>,
246 pub thoughts_token_count: Option<usize>,
247 pub total_token_count: Option<usize>,
248}
249
250#[derive(Debug, Deserialize, Serialize)]
251#[serde(rename_all = "camelCase")]
252pub struct GenerationConfig {
253 pub candidate_count: Option<usize>,
254 pub stop_sequences: Option<Vec<String>>,
255 pub max_output_tokens: Option<usize>,
256 pub temperature: Option<f64>,
257 pub top_p: Option<f64>,
258 pub top_k: Option<usize>,
259}
260
261#[derive(Debug, Serialize, Deserialize)]
262#[serde(rename_all = "camelCase")]
263pub struct SafetySetting {
264 pub category: HarmCategory,
265 pub threshold: HarmBlockThreshold,
266}
267
268#[derive(Debug, Serialize, Deserialize)]
269pub enum HarmCategory {
270 #[serde(rename = "HARM_CATEGORY_UNSPECIFIED")]
271 Unspecified,
272 #[serde(rename = "HARM_CATEGORY_DEROGATORY")]
273 Derogatory,
274 #[serde(rename = "HARM_CATEGORY_TOXICITY")]
275 Toxicity,
276 #[serde(rename = "HARM_CATEGORY_VIOLENCE")]
277 Violence,
278 #[serde(rename = "HARM_CATEGORY_SEXUAL")]
279 Sexual,
280 #[serde(rename = "HARM_CATEGORY_MEDICAL")]
281 Medical,
282 #[serde(rename = "HARM_CATEGORY_DANGEROUS")]
283 Dangerous,
284 #[serde(rename = "HARM_CATEGORY_HARASSMENT")]
285 Harassment,
286 #[serde(rename = "HARM_CATEGORY_HATE_SPEECH")]
287 HateSpeech,
288 #[serde(rename = "HARM_CATEGORY_SEXUALLY_EXPLICIT")]
289 SexuallyExplicit,
290 #[serde(rename = "HARM_CATEGORY_DANGEROUS_CONTENT")]
291 DangerousContent,
292}
293
294#[derive(Debug, Serialize, Deserialize)]
295pub enum HarmBlockThreshold {
296 #[serde(rename = "HARM_BLOCK_THRESHOLD_UNSPECIFIED")]
297 Unspecified,
298 #[serde(rename = "BLOCK_LOW_AND_ABOVE")]
299 BlockLowAndAbove,
300 #[serde(rename = "BLOCK_MEDIUM_AND_ABOVE")]
301 BlockMediumAndAbove,
302 #[serde(rename = "BLOCK_ONLY_HIGH")]
303 BlockOnlyHigh,
304 #[serde(rename = "BLOCK_NONE")]
305 BlockNone,
306}
307
308#[derive(Debug, Serialize, Deserialize)]
309#[serde(rename_all = "SCREAMING_SNAKE_CASE")]
310pub enum HarmProbability {
311 #[serde(rename = "HARM_PROBABILITY_UNSPECIFIED")]
312 Unspecified,
313 Negligible,
314 Low,
315 Medium,
316 High,
317}
318
319#[derive(Debug, Serialize, Deserialize)]
320#[serde(rename_all = "camelCase")]
321pub struct SafetyRating {
322 pub category: HarmCategory,
323 pub probability: HarmProbability,
324}
325
326#[derive(Debug, Serialize, Deserialize)]
327#[serde(rename_all = "camelCase")]
328pub struct CountTokensRequest {
329 pub contents: Vec<Content>,
330}
331
332#[derive(Debug, Serialize, Deserialize)]
333#[serde(rename_all = "camelCase")]
334pub struct CountTokensResponse {
335 pub total_tokens: usize,
336}
337
338#[derive(Debug, Serialize, Deserialize)]
339pub struct FunctionCall {
340 pub name: String,
341 pub args: serde_json::Value,
342}
343
344#[derive(Debug, Serialize, Deserialize)]
345pub struct FunctionResponse {
346 pub name: String,
347 pub response: serde_json::Value,
348}
349
350#[derive(Debug, Serialize, Deserialize)]
351#[serde(rename_all = "camelCase")]
352pub struct Tool {
353 pub function_declarations: Vec<FunctionDeclaration>,
354}
355
356#[derive(Debug, Serialize, Deserialize)]
357#[serde(rename_all = "camelCase")]
358pub struct ToolConfig {
359 pub function_calling_config: FunctionCallingConfig,
360}
361
362#[derive(Debug, Serialize, Deserialize)]
363#[serde(rename_all = "camelCase")]
364pub struct FunctionCallingConfig {
365 pub mode: FunctionCallingMode,
366 #[serde(skip_serializing_if = "Option::is_none")]
367 pub allowed_function_names: Option<Vec<String>>,
368}
369
370#[derive(Debug, Serialize, Deserialize)]
371#[serde(rename_all = "lowercase")]
372pub enum FunctionCallingMode {
373 Auto,
374 Any,
375 None,
376}
377
378#[derive(Debug, Serialize, Deserialize)]
379pub struct FunctionDeclaration {
380 pub name: String,
381 pub description: String,
382 pub parameters: serde_json::Value,
383}
384
385#[cfg_attr(feature = "schemars", derive(schemars::JsonSchema))]
386#[derive(Clone, Default, Debug, Deserialize, Serialize, PartialEq, Eq, strum::EnumIter)]
387pub enum Model {
388 #[serde(rename = "gemini-1.5-pro")]
389 Gemini15Pro,
390 #[serde(rename = "gemini-1.5-flash")]
391 Gemini15Flash,
392 #[serde(rename = "gemini-2.0-pro-exp")]
393 Gemini20Pro,
394 #[serde(rename = "gemini-2.0-flash")]
395 #[default]
396 Gemini20Flash,
397 #[serde(rename = "gemini-2.0-flash-thinking-exp")]
398 Gemini20FlashThinking,
399 #[serde(rename = "gemini-2.0-flash-lite-preview")]
400 Gemini20FlashLite,
401 #[serde(rename = "gemini-2.5-pro-exp-03-25")]
402 Gemini25ProExp0325,
403 #[serde(rename = "gemini-2.5-pro-preview-03-25")]
404 Gemini25ProPreview0325,
405 #[serde(rename = "gemini-2.5-flash-preview-04-17")]
406 Gemini25FlashPreview0417,
407 #[serde(rename = "custom")]
408 Custom {
409 name: String,
410 /// The name displayed in the UI, such as in the assistant panel model dropdown menu.
411 display_name: Option<String>,
412 max_tokens: usize,
413 },
414}
415
416impl Model {
417 pub fn default_fast() -> Model {
418 Model::Gemini15Flash
419 }
420
421 pub fn id(&self) -> &str {
422 match self {
423 Model::Gemini15Pro => "gemini-1.5-pro",
424 Model::Gemini15Flash => "gemini-1.5-flash",
425 Model::Gemini20Pro => "gemini-2.0-pro-exp",
426 Model::Gemini20Flash => "gemini-2.0-flash",
427 Model::Gemini20FlashThinking => "gemini-2.0-flash-thinking-exp",
428 Model::Gemini20FlashLite => "gemini-2.0-flash-lite-preview",
429 Model::Gemini25ProExp0325 => "gemini-2.5-pro-exp-03-25",
430 Model::Gemini25ProPreview0325 => "gemini-2.5-pro-preview-03-25",
431 Model::Gemini25FlashPreview0417 => "gemini-2.5-flash-preview-04-17",
432 Model::Custom { name, .. } => name,
433 }
434 }
435
436 pub fn display_name(&self) -> &str {
437 match self {
438 Model::Gemini15Pro => "Gemini 1.5 Pro",
439 Model::Gemini15Flash => "Gemini 1.5 Flash",
440 Model::Gemini20Pro => "Gemini 2.0 Pro",
441 Model::Gemini20Flash => "Gemini 2.0 Flash",
442 Model::Gemini20FlashThinking => "Gemini 2.0 Flash Thinking",
443 Model::Gemini20FlashLite => "Gemini 2.0 Flash Lite",
444 Model::Gemini25ProExp0325 => "Gemini 2.5 Pro Exp",
445 Model::Gemini25ProPreview0325 => "Gemini 2.5 Pro Preview",
446 Model::Gemini25FlashPreview0417 => "Gemini 2.5 Flash Preview",
447 Self::Custom {
448 name, display_name, ..
449 } => display_name.as_ref().unwrap_or(name),
450 }
451 }
452
453 pub fn max_token_count(&self) -> usize {
454 match self {
455 Model::Gemini15Pro => 2_000_000,
456 Model::Gemini15Flash => 1_000_000,
457 Model::Gemini20Pro => 2_000_000,
458 Model::Gemini20Flash => 1_000_000,
459 Model::Gemini20FlashThinking => 1_000_000,
460 Model::Gemini20FlashLite => 1_000_000,
461 Model::Gemini25ProExp0325 => 1_000_000,
462 Model::Gemini25ProPreview0325 => 1_000_000,
463 Model::Gemini25FlashPreview0417 => 1_000_000,
464 Model::Custom { max_tokens, .. } => *max_tokens,
465 }
466 }
467}
468
469impl std::fmt::Display for Model {
470 fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
471 write!(f, "{}", self.id())
472 }
473}