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@w-e-w
Last active June 22, 2024 04:35
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Stable Diffusion web UI txt2img img2img api example script
from datetime import datetime
import urllib.request
import base64
import json
import time
import os
webui_server_url = 'http://127.0.0.1:7860'
out_dir = 'api_out'
out_dir_t2i = os.path.join(out_dir, 'txt2img')
out_dir_i2i = os.path.join(out_dir, 'img2img')
os.makedirs(out_dir_t2i, exist_ok=True)
os.makedirs(out_dir_i2i, exist_ok=True)
def timestamp():
return datetime.fromtimestamp(time.time()).strftime("%Y%m%d-%H%M%S")
def encode_file_to_base64(path):
with open(path, 'rb') as file:
return base64.b64encode(file.read()).decode('utf-8')
def decode_and_save_base64(base64_str, save_path):
with open(save_path, "wb") as file:
file.write(base64.b64decode(base64_str))
def call_api(api_endpoint, **payload):
data = json.dumps(payload).encode('utf-8')
request = urllib.request.Request(
f'{webui_server_url}/{api_endpoint}',
headers={'Content-Type': 'application/json'},
data=data,
)
response = urllib.request.urlopen(request)
return json.loads(response.read().decode('utf-8'))
def call_txt2img_api(**payload):
response = call_api('sdapi/v1/txt2img', **payload)
for index, image in enumerate(response.get('images')):
save_path = os.path.join(out_dir_t2i, f'txt2img-{timestamp()}-{index}.png')
decode_and_save_base64(image, save_path)
def call_img2img_api(**payload):
response = call_api('sdapi/v1/img2img', **payload)
for index, image in enumerate(response.get('images')):
save_path = os.path.join(out_dir_i2i, f'img2img-{timestamp()}-{index}.png')
decode_and_save_base64(image, save_path)
if __name__ == '__main__':
payload = {
"prompt": "masterpiece, (best quality:1.1), 1girl <lora:lora_model:1>", # extra networks also in prompts
"negative_prompt": "",
"seed": 1,
"steps": 20,
"width": 512,
"height": 512,
"cfg_scale": 7,
"sampler_name": "DPM++ 2M",
"n_iter": 1,
"batch_size": 1,
# example args for x/y/z plot
# "script_name": "x/y/z plot",
# "script_args": [
# 1,
# "10,20",
# [],
# 0,
# "",
# [],
# 0,
# "",
# [],
# True,
# True,
# False,
# False,
# 0,
# False
# ],
# example args for Refiner and ControlNet
# "alwayson_scripts": {
# "ControlNet": {
# "args": [
# {
# "batch_images": "",
# "control_mode": "Balanced",
# "enabled": True,
# "guidance_end": 1,
# "guidance_start": 0,
# "image": {
# "image": encode_file_to_base64(r"B:\path\to\control\img.png"),
# "mask": None # base64, None when not need
# },
# "input_mode": "simple",
# "is_ui": True,
# "loopback": False,
# "low_vram": False,
# "model": "control_v11p_sd15_canny [d14c016b]",
# "module": "canny",
# "output_dir": "",
# "pixel_perfect": False,
# "processor_res": 512,
# "resize_mode": "Crop and Resize",
# "threshold_a": 100,
# "threshold_b": 200,
# "weight": 1
# }
# ]
# },
# "Refiner": {
# "args": [
# True,
# "sd_xl_refiner_1.0",
# 0.5
# ]
# }
# },
# "enable_hr": True,
# "hr_upscaler": "R-ESRGAN 4x+ Anime6B",
# "hr_scale": 2,
# "denoising_strength": 0.5,
# "styles": ['style 1', 'style 2'],
# "override_settings": {
# 'sd_model_checkpoint': "sd_xl_base_1.0", # this can use to switch sd model
# },
}
call_txt2img_api(**payload)
init_images = [
encode_file_to_base64(r"B:\path\to\img_1.png"),
# encode_file_to_base64(r"B:\path\to\img_2.png"),
# "https://image.can/also/be/a/http/url.png",
]
batch_size = 2
payload = {
"prompt": "1girl, blue hair",
"seed": 1,
"steps": 20,
"width": 512,
"height": 512,
"denoising_strength": 0.5,
"n_iter": 1,
"init_images": init_images,
"batch_size": batch_size if len(init_images) == 1 else len(init_images),
# "mask": encode_file_to_base64(r"B:\path\to\mask.png")
}
# if len(init_images) > 1 then batch_size should be == len(init_images)
# else if len(init_images) == 1 then batch_size can be any value int >= 1
call_img2img_api(**payload)
# there exist a useful extension that allows converting of webui calls to api payload
# particularly useful when you wish setup arguments of extensions and scripts
# https://github.com/huchenlei/sd-webui-api-payload-display
@w-e-w
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w-e-w commented May 22, 2024

Did they remove the txt2img & img2img APIs? Please anyone gives us confirmation, thanks.

api works


... HTTP Error 404: Not Found ...

the API error message is not that descripted, we use 404 for lots of things "not found"

txt2img and img2img

  • Sampler not found
    img2img
  • Init image not found
    interrogate
  • Image not found
  • Model not found

in particular there was some change to the sampler scheduler in 1.9
we did not have the foresight to implement backwards compatibility and result in a 404 if you try to generate an image with a non-existent sampler scheduler

@kid9591
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kid9591 commented May 22, 2024

@w-e-w
I created a request using Postman and it says "Not found". Can you tell me what is wrong here?

Screenshot 2024-05-22 at 14 01 30

Moreover, at "http://127.0.0.1:7860/docs#/" I cannot see the description for that above 2 APIs. I installed Automatic1111 v1.9.3

@w-e-w
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w-e-w commented May 22, 2024

Moreover, at "http://127.0.0.1:7860/docs#/" I cannot see the description for that above 2 APIs. I installed Automatic1111 v1.9.3

that's odd, it's showing on mine
image

but since you give me practically zero information I can't really help
if I think your experiencing an issue don't ask here make an issue post

@zhangbool
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Got the same issue: "... HTTP Error 404: Not Found ..."
I searched the http://127.0.0.1:7860/docs#/, no /sdapi/v1/txt2img was found.
restart for several times, still not working.

So I search all the webui process use the following cmd:
ps -ef | grep webui.sh | grep -v grep | gawk '{ print $2 }' and kill all the pids
then I search the 7860 port use the following cmd:
netstat -antlp | grep LISTEN | grep 7860 and kill the pid again.
then I start webui again, and finally the /sdapi/v1/txt2img was shown and the api test code worked.

I don't know why.
if you guys have the same issue, try to clean all the process and restart with --api.

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